intransitive verb
Definition: To make an estimation or assumption about something without having all the facts.
Example: I can only guess what she is thinking.
noun
Definition: A statement or opinion that is made without complete information, often based on intuition or estimation.
Example: My guess is that it will rain tomorrow.
transitive verb
Definition: To make an estimate or opinion about something without having all the facts or information.
Example: I guess the movie starts at 7 PM, but I'm not sure.