Remark.
Synonyms:
annotation, comment, note, observation, utterance.
A remark is a saying or brief statement, oral or written, commonly made without much premeditation; a comment is an explanatory or critical remark, as upon some passage in a literary work or some act or speech in common life. A note is something to call attention, hence a brief written statement; in correspondence, a note is briefer than a letter. A note upon some passage in a book is briefer and less elaborate than a comment. Annotations are especially brief notes, commonly marginal, and closely following the text. Comments, observations, or remarks may be oral or written, comments being oftenest written, and remarks oftenest oral. An observation is properly the result of fixed attention and reflection; a remark may be the suggestion of the instant. Remarks are more informal than a speech.