"indefinite" in the adjective sense
1. indefinite
vague or not clearly defined or stated
"must you be so indefinite?"
"amorphous blots of color having vague and indefinite edges"
"he would not answer so indefinite a proposal"
2. indefinite
not decided or not known
"were indefinite about their plans"
"plans are indefinite"
Source: WordNet® (An amazing lexical database of English)
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