* Noun: A written message, a musical sound, or a brief written record (e.g., "I left a note on the door." "The pianist played a high note.")
* Verb: To make a written record of something, to observe something, or to express a comment (e.g., "Please note the changes to the schedule." "I noted her enthusiasm.")
* Adjective: Meaning noteworthy or notable (e.g., "That was a note-worthy performance.")
It's important to consider the context to determine the correct part of speech.