Lexical Definition

‎συμπληρόω‎ symplēróō (soom-play-ro'-o) to (ful)fill ^G:V
from ‎σύν‎ and ‎πληρόω‎

(fully) come, fill up.

• to implenish completely, i.e. (of space) to swamp (a boat), or (of time) to accomplish (passive, be complete)

Abbott-Smith

συν-πληρόω (Rec. συμπ-), -ῶ, [in LXX: Je 25:12 (מָלֵא) * ;]
1. to fill up completely (Thuc., of manning ships): of a ship filling with water, and by meton., of those on board, Lk 8:23.
2. to complete, fulfil: of time (Je, l.c., and v. MM, xxiv), Lk 9:51, Ac 2:1 (on the "durative inf.," v. M, Pr., 233).†

Abbott-Smith References

Liddell-Scott-Jones

συμπληρόω-όω,

help to fill, σ. τοῖσι Ἀθηναίοισι τὰς νέας help them in manning.. , [Refs 5th c.BC+]

__II fill up or completely, ἑξήκοντα ναῦς man them fully, [Refs 5th c.BC+]; τὸν μεταξὺ τόπον, τὸ μ., [Refs 5th c.BC+]:—middle, σ. τὰ διαστήματα [Refs 5th c.BC+]:—passive, τὸ δὲ [τῆς σύριγγος] πάλιν ξυμπληρωθείη [Refs 5th c.BC+]
__II.b in Medicine texts, cause congestion of, τὰ ὑποθυμιάματα σ. τὴν κεφαλήν [Refs 2nd c.AD+]:—passive, suffer from congestion of the brain, [Refs 2nd c.AD+]
__II.2 complete, τὸ ὅλον [συμπληρόωούντων τοῦτο 3rd c.AD: Plotinus Philosophus 1.8.3, compare 2.6.1 ">Refs 4th c.BC+]; τὰ συμπληρόωοῦντα τὴν ἀρίστην μαῖαν the qualities which make up the complete good midwife, [Refs 2nd c.AD+] —passive, [δένδρα] συμπεπληρωμένα πᾶσι τοῖς οἰκείοις μορίοις, opposed to ἀρχόμενα φύεσθαι, [Refs 2nd c.AD+]
__II.3 fulfil, attain, τὸ τῆς φύσεως τέλος [Refs 3rd c.BC+]:—middle, τὸ τῆς ψυχῆς καὶ τοῦ σώματος ἀγαθόν [Refs 4th c.BC+] —passive, [Refs]
__II.4 finish, περὶ τοῦ λίαν ὀξέος ὀξυμέλιτος συμπληρόωώσας τὸν λόγον [Refs 2nd c.AD+]