Lexical Definition

‎θέλω‎ thélō (thel'-o) to will/desire ^G:V
apparently strengthened from the alternate form of ‎αἱρέομαι‎

desire, be disposed (forward), intend, list, love, mean, please, have rather, (be) will (have, -ling, - ling(-ly)).

• to determine (as an active option from subjective impulse
• whereas ‎βούλομαι‎ properly denotes rather a passive acquiescence in objective considerations), i.e. choose or prefer (literally or figuratively)
• by implication, to wish, i.e. be inclined to (sometimes adverbially, gladly)
• impersonally for the future tense, to be about to
• by Hebraism, to delight in

Abbott-Smith

θέλω (the strengthened form ἐθέλω is found in Hom., and is the more freq. in Attic; v. Rutherford, NPhr., 415 f.), [in LXX for חפץ אבה; c. neg., מאן pi., etc.;]
to will, be willing, wish, desire (more freq. than βούλομαι, q.v., in vernac. and late Gk., also in MGr.; for various views as to its relation to β., v. Thayer, 286; but v. also Bl., §24, s.v.): absol., Ro 9:16, I Co 4:19 12:18, Ja 4:15; τ. θεοῦ θέλοντος, Ac 18:21; c. acc. rei, Mt 20:21, Mk 14:36, Jo 15:7, Ro 7:15, 16, I Co 4:21 7:36, Ga 5:17; c. inf., Mt 5:40, Mk 10:43, Jo 6:21, 67, Ro 7:21, Ga 4:9; c. acc. et inf., Mk 7:24, Lk 1:62, Jo 21:22, 23, Ro 16:19, I Co 14:5, Ga 6:13; οὐ θέλω, Mt 18:30, al.; id. c. inf., Mt 2:18, Mk 6:26, Jo 5:40, I Co 16:7; seq. ἵνα, Mt 7:12, Mk 6:25, Jo 17:24; opp. to ποιέω, πράσσω, ἐνεργέω, Ro 7:15, 19, II Co 8:10, 11, Phl 2:13; seq. ἤ (ICG, in l.; Deiss., LAE, 17924), I Co 14:19; θέλων ἐν ταπεινοφροσυνῄ (of his own mere will, by humility, R, mg), Col 2:18; in OT quotations, for Heb. חפץ, c. acc. pers., Mt 27:43; c. acc. rei, Mt 9:13 12:7, He 10:5, 8; c. inf., I Pe 3:10; for אמר, c. inf., Ac 7:28 (v. Cremer, 726 ff.).

Abbott-Smith References

Liddell-Scott-Jones

θέλω,

see at {ἐθέλω} and add ὅστις ἂν θέλῃ [Refs]