indefinite /ɪnˈdɛfɪnɪt/adjective 5noun 1forms 3 adjective5 •Without limit; forever, or until further notice; not definite.Your account will be suspended for an indefinite period of time. •Being an integral without specified limits.Don't forget to m the +C when calculating indefinite integrals. •Designating an unspecified or unidentified person or thing or group of persons or things. •Vague or unclear.She gave an indefinite answer which nobody really understood. •Undecided or uncertain.I'm still indefinite about what I'm going to study at college. noun1 •A word or phrase that designates an unspecified or unidentified person or thing or group of persons or things. formsindefinites · more indefinite · most indefinite