ejacu·la·tionBrE/iˌdʒækjuˈleɪʃn/NAmE/iˌdʒækjuˈleɪʃn/noun[C, U]theactofejaculating; themomentwhensperm comes out of a man's penis射精◆prematureejaculation早泄[C](formal) asuddenshoutorsoundthatyoumakewhenyouareangryorsurprised(愤怒或吃惊时)突然喊出,叫喊SYNexclamation