lasting for a period of time that has no fixed end 无限期的；期限不定的 She will be away for the indefinite future. 她将离开一段时间，期限不定。 The workers have been on indefinite strike since July. 工人从7月起就开始了无限期的罢工。
not clearly defined 模糊不清的；不明确的 an indefinite science 界定不明的科学
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’).