uncertain

The definition of uncertain is not definite or not confirmed.

(adjective)

An example of uncertain is if you are not sure what you are going to be doing tomorrow; uncertain schedule.

See uncertain in Webster's New World College Dictionary

adjective

1. not surely or certainly known; questionable; problematic
2. not sure or certain in knowledge; doubtful
not definite or determined; vague
liable to vary or change; not dependable or reliable
not steady or constant; varying

Origin: ME uncertayn

Related Forms:

See uncertain in American Heritage Dictionary 4

adjective

Not known or established; questionable: domestic changes of great if uncertain consequences.
Not determined; undecided: uncertain plans.
Not having sure knowledge: an uncertain recollection of the sequence of events.
a. Subject to change; variable: uncertain weather.
b. Unsteady; fitful: uncertain light.

Related Forms: