Bailly
α, ον, vb. de λαμϐάνω, XÉN. Mem. 1, 7, 2 ; PLAT. Soph. 226 a, etc. ; au neutre, XÉN. Cyr. 8, 1, 10, etc.
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LSJ
α, ον, (< λαμβάνω) to be taken or accepted, Pl. Prt. 356b. neut. ληπτέον, one must take hold, Ar. Eq. 603; ἔργον λ.
one must undertake, X. Mem. 1.7.2; one must assume in arguing, etc., Pl. Phlb. 61a; one must take or choose, ἐκ τούτων ἐπιστάτας λ. X. Cyr. 8.1.10; λ. δὲ… τίνας ὅρους λέγουσι Arist. Pol. 1280a7.
one must take, receive, ὁμήρους δοτέον καὶ λ. X. HG 3.2.18; one must submit to, πληγὰς ὑπὸ τῶν ἀμεινόνων Id. Lac. 9.5.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)