Lexical Definition

‎λογικός‎ logikós (log-ik-os') spiritual ^G:A
from ‎λόγος‎

reasonable, of the word.

• rational ("logical")

Abbott-Smith

* λογικός, -ή, -όν (< λόγος, reason),
reasonable, rational: λατρεία, Ro 12:1; τὸ λ. (i.e. spiritual) γάλα (v. Hort, in l.; MM, xvi), I Pe 2:2 (in support of AV, milk of the word, v. ICC, in l.).†

Abbott-Smith References

Liddell-Scott-Jones

λογικός-ός, ή, όν,

(λόγος) of or for speaking or speech, μέρη λ. the organs of speech, [Refs 1st c.AD+], speech, opposed to μουσική, [Refs 1st c.BC+]expressed in speech, [Refs]

__2 of or in eloquence, ἀγῶνες [Refs 2nd c.BC+]
__3 suited for prose, ὁ ἡρῷος σεμνὸς καὶ οὐ λ. [Refs 4th c.BC+]; of persons, writing in prose, [Refs 3rd c.AD+]in prose, [Refs]
__II possessed of reason, intellectual, μέρος [Refs 5th c.BC+]; ἀρεταὶ λ., ={διανοητικαί}, opposed to ἠθικαί, [Refs 4th c.BC+]
__II.2 dialectical, argumentative, οἱ λ. διάλογοι of Plato, such as the Theaetetus and Cratylus, [Refs 4th c.BC+] usually like{διαλεκτικός, λ. συλλογισμός} [Refs]more abstract, Metaphorical [Refs]; λ. δυσχέρειαι[Refs]; but also, logical, λ. συλλογισμοί, opposed to ῥητορικοί, [Refs]. adverb - κῶς dialectically, Metaphorical [Refs]: comparative -ώτερον [Refs]
__II.2.b substantive, ἡ λογική (i.e. τέχνη) logic, [Refs 1st c.BC+]; περὶ λογικῶν title of work, [Refs 3rd c.AD+]; τὸ λ., opposed to τὸ φυσικόν, τὸ ἠθικόν, [Refs 4th c.BC+]
__II.3 of the 'dogmatic' school of physicians, ἡ λ. αἵρεσις [Refs 2nd c.AD+]