Thayer's is also quite cheap, and has more full-fledged definitions:
βλέπω; [impf. ἔβλεπον]; fut. βλέψω; 1 aor. ἔβλεψα; [pres. pass. βλέπομαι]; Sept. for רָאָה, פָגָה, חָזָה, הִבִּיט; in Grk. writ. fr. Aeschyl. down; to see, discern;
1. with the bodily eye;
a. to be possessed of sight, have the power of seeing, opp. to τυφλός: Mt. 12:22: 13:16; 15:31; Jn. 9:7, 15, 19, 25; Acts 9:9; Ro. 11:8, 10; Rev. 3:18, etc. (Soph. Oed. Col. 73; Arstph. Plut. 15; Xen. mem. 1, 3, 4; Ael. v. h. 6, 12, etc. Ex. 4:11; 23:8, etc. Tob. 11:15). τὸ βλέπειν sight, the power of seeing, Lk. 7:21 (G L T Tr WH om. τό).
b. to perceive by the use of the eyes, to see, look, descry;
α. absol.: βλεπόντων αὐτῶν while they were looking, Acts 1:9; [12:11 Tr mrg. WH mrg.]; ἔρχου καὶ βλέπε, Rec. in Rev. 6:1, 3, 5, 7.
β. with acc. of pers. or thing: Mt. 7:3; 11:4; 24:2; Mk. 5:31; 8:23 sq.; 13:2; Lk. 6:41; 24:12 [T om. L Tr br. WH reject the vs.]; Jn. 1:29; Acts 4:14, etc.; [Rev. 18:18 Rec. ὁρῶντες]; τὴν φωνήν, him who uttered the voice, Rev. 1:12; ὅραμα, Acts 12:9; he who has free access to one, as princes, ministers, and personal friends have to a king, is said βλ. τὸ πρόσωπόν τινος (רֹאֵי פְנֵי הֵמֶּלֶךְ, 2 K. 25:19; Jer. 52:25; Esth. 1:14); hence in Mt. 18:10 angels of closest access or of highest rank are referred to (see ἀρχάγγελος). Pass. τὰ βλεπόμενα the things that are seen: 2 Co. 4:18; Heb. 11:3 (L T Tr WH τὸ βλεπόμενον, the sum-total or complex of things seen); ἐλπὶς βλεπομένη hope of things that are seen, i. e. that are present, Ro. 8:24.
c. to turn the eyes to anything, to look at, look upon, gaze at: γυναῖκα, Mt. 5:28; είς τι or τινα [W. § 33 g.], Lk. 9:62; Jn. 13:22; Acts 3:4; εἰς τὸν οὐρανόν, Acts 1:11 T Tr WH; in the sense of looking into (i. e. in order to read), βιβλίον, Rev. 5:3 sq.
d. univ. to perceive by the senses, to feel: τὸν ἄνεμον ἰσχυρόν [T WH om. ἰσχ.], Mt. 14:30, (κτύπον δέδορκα, Aeschyl. sept. 104).
e. to discover by use, to know by experience: τί, Ro. 7:23; foll. by ὅτι, 2 Co. 7:8; by attract. τὸ θηρίον, ὅτι κτλ. Rev. 17:8; ὑπὲρ ὃ βλέπει με for ὑπὲρ τοῦτο, ὅ βλέπει με ὄντα, lest he think me greater than on personal knowledge he finds me to be, 2 Co. 12:6.
2. metaph. to see with the mind’s eye;
a. to have (the power of) understanding: βλέποντες οὐ βλέπουσι, though endued with understanding they do not understand, Mt. 13:13; Lk. 8:10.
b. to discern mentally, observe, perceive, discover, understand; absol.: διʼ ἐσόπτρου, 1 Co. 13:12; of the omniscient God βλέπων ἐν τῷ κρυπτῷ seeing in secret, where man sees nothing, Mt. 6:4, 6, 18 [here L T Tr WH βλ. ἐν τ. κρυφαίῳ]; ἐγγίζουσαν τὴν ἡμέραν, Heb. 10:25 (fr. certain external signs); Ἰησοῦν … ἐστεφανωμένον, we see (from his resurrection and from the effects and witness of the Holy Spirit) Jesus crowned, Heb. 2:9; foll. by ὅτι, Heb. 3:19; Jas. 2:22.
c. to turn the thoughts or direct the mind to a thing, to consider, contemplate, look to; absol. βλέπετε take heed: Mk. 13:23, 33; with an acc. of the thing or pers., 1 Co. 1:26; 10:18; 2 Co. 10:7; Phil. 3:2; Col. 2:5; foll. by πῶς with indic. [W. 300 (282); B. 255 (219)], Lk. 8:18; 1 Co. 3:10; Eph. 5:15; to weigh carefully, examine, foll. by interrog. τί with indic. Mk. 4:24; εἰς πρόσωπόν τινος, to look at i. e. have regard to one’s external condition,—used of those who are influenced by partiality: Mt. 22:16; Mk. 12:14. By a use not found in Grk. auth. ἑαυτὸν βλέπειν to look to one’s self (i. q. sibi cavere): Mk. 13:9; foll. by ἵνα μή [cf. B. 242 (209)], 2 Jn. 8; βλέπειν ἀπό τινος (i. q. sibi cavere ab aliquo) to beware of one [W. 223 (209), cf. 39 (38); B. 242 (209), cf. 323 (278)], Mk. 8:15; 12:38; look to in the sense of providing, taking care: foll. by ἵνα, 1 Co. 16:10; foll. by μή with subj. aor., Mt. 24:4; Mk. 13:5; Lk. 21:8; Acts 13:40; 1 Co. 8:9 (μήπως); 10:12; Gal. 5:15; Heb. 12:25; foll. by μή with fut. indic. Col. 2:8; Heb. 3:12. The Grks. say ὁρᾶν μή, [cf. W. 503 (468 sq.); B. 242 sq. (209)].
3. in a geographical sense, like Lat. specto [Eng. look], of places, mountains, buildings, etc., turned towards any quarter, as it were facing it: foll. by κατά with acc. Acts 27:12 [cf. B. D. Am. ed. s. v. Phenice], (Sept. [Num. 21:20]; Ezek. 11:1; [44:1; 47:1]; πρός, Xen. Hell. 7, 1, 17; mem. 3, 8, 9; Hdian. 6, 5, 2; Diog. Laërt. 1, 2, 48; Sept. Ezek. 9:2; 40:24; [46:1]; εἰς, 8:3, etc. [for other exx. see Soph. Lex. s. v.]). [SYN. see s. v. ὁράω. COMP.: ἀνα-, ἀπο-, δια-, ἐμ-, ἐπι-, περι-, προ-βλέπω.]
Joseph Henry Thayer, A Greek-English Lexicon of the New Testament: Being Grimm’s Wilke's Clavis Novi Testamenti (New York: Harper & Brothers., 1889), 103.
θεωρέω, -ῶ; impf. ἐθεώρουν; [fut. θεωρήσω, Jn. 7:3 T Tr WH]; 1 aor. ἐθεώρησα; (θεωρός a spectator, and this fr. θεάομαι, q. v. [cf. Vaniček p. 407; L. and S. s. v.; Allen in the Am. Journ. of Philol. i. p. 131 sq.]); [fr. Aeschyl. and Hdt. down]; Sept. for רָאָה and Chald. חָזָה;
1. to be a spectator, look at, behold, Germ. schauen, (the θεωροί were men who attended the games or the sacrifices as public deputies; cf. Grimm on 2 Macc. 4:19); absol.: Mt. 27:55; Mk. 15:40; Lk. 23:35; foll. by indir. disc., Mk. 12:41; 15:47; used esp. of persons and things looked upon as in some respect noteworthy: τινά, Jn. 6:40; 16:10, 16 sq. 19; Acts 3:16; 25:24; Rev. 11:11 sq.; ὁ θεωρῶν τὸν υἱὸν θεωρεῖ τὸν πατέρα, the majesty of the Father resplendent in the Son, Jn. 12:45; τινά with ptcp. [B. 301 (258): Mk. 5:15]; Lk. 10:18; Jn. 6:19; [10:12]; 20:12, 14; [1 Jn. 3:17]; τί, Lk. 14:29; 21:6; 23:48; Acts 4:13; τὰ σημεῖα, Jn. 2:23; 6:2 L Tr WH; Acts 8:13, (θαυμαστὰ τέρατα, Sap. 19:8); τὰ ἔργα τοῦ Χριστοῦ, Jn. 7:3; τί with ptcp., Jn. 20:6; Acts 7:56; 10:11; foll. by ὅτι, Acts 19:26; to view attentively, take a view of, survey: τί, Mt. 28:1; to view mentally, consider: foll. by orat. obliq., Heb. 7:4.
2. to see; i.e.
a. to perceive with the eyes: πνεῦμα, Lk. 24:37; τινά with a ptcp., ibid. 39; τινά, ὅτι, Jn. 9:8; τὸ πρόσωπόν τινος (after the Hebr.; see πρόσωπον, 1 a.), i. q. to enjoy the presence of one, have intercourse with him, Acts 20:38; οὐκέτι θεωρεῖν τινα, used of one from whose sight a person has been withdrawn, Jn. 14:19; οὐ θεωρεῖ ὁ κόσμος τὸ πνεῦμα, i.e. so to speak, has no eyes with which it can see the Spirit; he cannot render himself visible to it, cannot give it his presence and power, Jn. 14:17.
b. to discern, descry: τί, Mk. 5:38; τινά, Mk. 3:11; Acts 9:7.
c. to ascertain, find out, by seeing: τινά with a pred. acc., Acts 17:22; τί with ptcp., Acts 17:16; 28:6; ὅτι, Mk. 16:4; Jn. 4:19; 12:19; Acts 19:26; 27:10; foll. by indir. disc., Acts 21:20; Hebraistically (see εἴδω, I. 5) i. q. to get knowledge of: Jn. 6:62 (τ. υἱὸν τ. ἀνθρώπου ἀναβαίνοντα the Son of Man by death ascending; cf. Lücke, Meyer [yet cf. Weiss in the 6th Aufl.], Baumg.-Crusius, in loc.); τὸν θάνατον i.e. to die, Jn. 8:51; and on the other hand, τὴν δόξαν τοῦ Χριστοῦ, to be a partaker of the glory, i.e. the blessed condition in heaven, which Christ enjoys, Jn. 17:24, cf. 22. [COMP.: ἀνα-, παρα-θεωρέω.]*
[SYN. θεωρεῖν, θεᾶσθαι, ὁρᾶν, σκοπεῖν: θεωρ. is used primarily not of an indifferent spectator, but of one who looks at a thing with interest and for a purpose; θεωρ. would be used of a general officially reviewing or inspecting an army, θεᾶσθ. of a lay spectator looking at the parade. θεωρ. as denoting the careful observation of details can even be contrasted with ὁρᾶν in so far as the latter denotes only perception in the general; so used θεωρεῖν quite coincides with σκοπ. Schmidt i. ch. 11; see also Green, ‘Crit. Note’ on Mt. 7:3. Cf. s. vv. ὁράω, σκοπέω.]
Joseph Henry Thayer, A Greek-English Lexicon of the New Testament: Being Grimm’s Wilke's Clavis Novi Testamenti (New York: Harper & Brothers., 1889), 289–290.