an't /nt, nt, nt ｜ nt/ 1 《英口語》 are not の縮約形.　★今は通例 aren't を用いる. 2 [疑問文で] 《英口語》 am not の縮約形.　★今は通例 aren't と書く (cf. amn't, not 1 a). ・I'm still young, an't I? 3 《方言・卑》 is not, has not, have not の縮約形. 4 《方言》 ＝ain't 1. 1706