Definitions

1. adjective

not clearly or certainly known or determined; vague or indefinite.

“The weather forecast was uncertain, and we decided to wait a day before traveling.”

2. noun

a person or thing that is not clearly or certainly known or determined.

“The uncertain identity of the suspect made it difficult for the police to make an arrest.”

3. adverb

in a way that is not clearly or certainly known or determined.

“She drove uncertainly through the foggy roads.”