LSJ
Med., note down for remembrance, make a memorandum of, τι Plu. 2.120d, etc.
write memoirs or annals, Plb. 5.33.5; ὑ. τὰς Ἀλεξάνδρου πράξεις Str. 2.1.9; — Pass., to be recorded, ἐν ᾧ ὑπεμνημάτιστο τάδε LXX 1 Es. 6.22 (23); so freq. in Pap., ἀξιοῦσιν ὑπομνηματισθῆναι τὴν ἔντευξιν αὐτῶν PHamb. 29.15 (i AD), cf. PRyl. 77.46 (ii AD), etc.
write a treatise, ὑ. τι περὶ ὕψους Longin. 1.2; treat of a subject, Demetr.Lac. Herc. 1055.23.
explain, interpret, οἱ ὑπομνηματισάμενοι commentators, A.D. Synt. 156.12, Sch. S. OC 390; so in Act., ὁ τὴν Ὀδύσσειαν ὑπομνηματίζων, ὁ Ὅμηρον ὑπομνηματίσας, St.Byz. s. vv. Δωδώνη, Ἐρυθραί, cf. Syrian. in Hermog. 1.1 R.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
explain, interpret (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars