lasting for a period of time that has no fixed end 無限期的；期限不定的 She will be away for the indefinite future. 她將離開一段時間，期限不定。 The workers have been on indefinite strike since July. 工人從7月起就開始了無限期的罷工。
not clearly defined 模糊不清的；不明確的 an indefinite science 界定不明的科學
Word Originmid 16th cent.: from Latin indefinitus, from in- ‘not’ + definitus ‘defined, set within limits’ (past participle of definire, from de- (expressing completion) + finire ‘finish’).