Mounce Concise Greek-English Dictionary

numeral one, Mt. 10:29, freq.; only, Mk. 12:6; one virtually by union, Mt. 19:5, 6; Jn. 10:30; one and the same, Lk. 12:52; Rom. 3:30; one in respect of office and standing, 1 Cor. 3:8; equivalent to τις, a certain one, Mt. 8:19; 16:14; a, an, Mt. 21:19; Jas. 4:13; εἱς ἕκαστος, each one, every one, Lk. 4:40; Acts 2:3; εἱς τὸν ἕνα, one another, 1 Thess. 5:11; εἱς καὶ εἱς, the one- and the other, Mt. 20:21; εἱς καθ’ εἱς and ὁδὲ καθ’ εἱς, one by one, one after another, in succession, Mk. 14:19; Jn. 8:9; as an ordinal, first, Mt. 28:1

Source: Mounce Concise Greek-English Dictionary