WordWeb Online

1. Vague or not clearly defined or stated
   "must you be so indefinite?"; "amorphous blots of colour having vague and indefinite edges"; "he would not answer so indefinite a proposal"
    
2. Not decided or not known
   "were indefinite about their plans"; "plans are indefinite"

See also: coy, indecisive, indefinitely, indefiniteness, indistinct, nebulous, noncommittal, one, uncertain, unclear, undefined, unfixed, vague

Antonym: definite

Encyclopedia: Indefinite