Luke 6:13ἀποστόλους
When daylight came, He called His disciples to Him and chose twelve of them, whom He also designated as apostles:
Acts 1:2ἀποστόλοις
until the day He was taken up to heaven, after giving instructions through the Holy Spirit to the apostles He had chosen.
Romans 1:1ἀπόστολος
Paul, a servant of Christ Jesus, called to be an apostle, and set apart for the gospel of God—
1 Corinthians 1:1ἀπόστολος
Paul, called to be an apostle of Christ Jesus by the will of God, and our brother Sosthenes,
2 Corinthians 1:1ἀπόστολος
Paul, an apostle of Christ Jesus by the will of God, and Timothy our brother, To the church of God in Corinth, together with all the saints throughout Achaia:
Ephesians 1:1ἀπόστολος
Paul, an apostle of Christ Jesus by the will of God, To the saints in Ephesus, the faithful in Christ Jesus:

Abbott-Smith

ἀπόστολος, -ου, ὁ
(ἀοστέλλω), [in LXX; 3Ki.14:6 A (שָׁלַח) * ;]

1. a fleet, an expedition (Dem.).

2. a messenger, one sent on a mission (Hdt., LXX, l.with, and π.; see M, Pr., 37 f.; MM, see word; M, Th., i, 2:7 and reff.): Jhn.13:16, 2Co.8:23 Php.2:25.

3. In NT, an Apostle of Christ

(a) with special ref. to the Twelve: Mat.10:2, Mrk.3:14, Luk.11:49, Eph.3:5, Rev.18:20, al., equality with whom is claimed by St. Paul, Gal.1:1, 11 ff, 1Ti.2:7, a1.;

(b) in a wider sense of prominent Christian teachers, as Barnabas, Act.14:14, apparently also Silvanus and Timothy, 1Th.2:6, and perhaps Andronicus and Junias (Junia?), Rom.16:7 (see ICC, in l); of false teachers, claiming apostleship: 2Co.11:5 11:13, Rev.2:2. (On the different uses of the term in NT, see Lit., Gal., 92-101; Cremer, 530; DB, i, 126; DCG, i, 105; Enc. Br., ii, 196 ff.)
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.