A verbal or written remark expressing an opinion or reaction. She left a comment on the blog post to share her thoughts.
A note in a program's source code that is not executed, used to explain the code to human readers. The programmer added a comment to clarify the purpose of the function.
A statement officially given as a response, or the absence of a statement, typically used in the phrase "no comment". When asked about the allegations, the spokesperson said the company had no comment.