/ ɪnˈdefɪnət; NAmE / adjective
1.
lasting for a period of time that has no fixed end :
She will be away for the indefinite future.
2.
not clearly defined
SYN imprecise :
an indefinite science
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WORD ORIGIN
mid 16th cent.: from Latin indefinitus , from in- not + definitus defined, set within limits (past participle of definire , from de- (expressing completion) + finire finish).