not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain"
If something is uncertain, it is not known or definite. How far the republics can give practical help, however, is uncertain It's uncertain whether they will accept the plan Students all over the country are facing an uncertain future
lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers"
subject to change; "a changeable climate"; "the weather is uncertain"; "unsettled weather with rain and hail and sunshine coming one right after the other"
If you are uncertain about something, you do not know what you should do, what is going to happen, or what the truth is about something. He was uncertain about his brother's intentions They were uncertain of the total value of the transaction He stopped, uncertain how to put the question tactfully With some hesitation and an uncertain smile, she held out her hand. = unsure certain + uncertainly un·cer·tain·ly He entered the hallway and stood uncertainly
ambiguous (especially in the negative); "she spoke in no uncertain terms" not established beyond doubt; still undecided or unknown; "an uncertain future"; "a manuscript of uncertain origin"; "plans are still uncertain"; "changes of great if uncertain consquences"; "without further evidence his story must remain uncertain" lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers" not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain" not consistent or dependable; "an uncertain recollection of events"; "a gun with a rather uncertain trigger" not safe from danger or mishap; "faced an uncertain future"; "an unsure existence" not firm or secure; "balancing three boxes in an uncertain pile
emphasis If you say that someone tells a person something in no uncertain terms, you are emphasizing that they say it strongly and clearly so that there is no doubt about what they mean. She told him in no uncertain terms to go away