STRONGS NT 5384: φίλοςφίλος, φίλη, φίλον, from Homer down, friendly (cf. Liddell and Scott, under the word, I. and II.): φίλον εἶναι τίνι, to be friendly to one, wish him well, Acts 19:31;

1. ὁ φίλος, the Sept. for רֵעַ , אֹהֵב, a substantive, a friend: Luke 7:6; Luke 11:5; Luke 15:6; Luke 16:9; Luke 23:12; Acts 27:3; 3 John 1:15(14): joined with συγγενεῖς, Luke 21:16; an associate, opposed to δοῦλος, John 15:15; φίλοι ἀναγκαιοι (A. V. near friends) Latinnecessitate conjuncti, Acts 10:24; φίλε, friend, in kindly address, Luke 14:10; with a genitive of the subject, ὁ φίλος τίνος, Luke 11:6,(8); ; John 11:11; John 15:13f; specifically, he who associates familiarly with one, a companion, Matthew 11:19; Luke 7:34; ὁ φίλος τοῦ νυμφίου, the rabbinical שׁושְׁבֵּן (which see in Buxtorf or Levy) (i. e. 'son of gladness'), one of the bridegroom's friends who on his behalf asked the hand of the bride and rendered him various services in closing the marriage and celebrating the nuptials (B. D., under the word Marriage, III.; Edersheim, Jewish Social Life, p. 152), John 3:29; φίλος τοῦ Καίσαρος, on Caesar's side, loyal to his interests, John 19:12; Θεοῦ, especially dear to God, peculiarly favored with his intimacy, James 2:23 ((cf. Harnack and Lightfoot on Clement of Rome, 1 Cor. 10, 1 [ET]; Rönsch in the Zeitschr. f. wissenschaftl. Theol. for 1873, p. 583f); also in secular authors cf. Grimm, Exeget. Hdbch. on Wis. 7:27, p. 164); with a genitive of the thing, one who finds his pleasure in a thing, φίλος τοῦ κόσμου, James 4:4.

2. Feminine, φίλη, ἡ, a (female) friend: Luke 15:9.