Example : He made a note of the appointment.

Example : Drop me a line when you get there.

Synonyms : billet, line, short letter

Example : The singer held the note too long.

Synonyms : musical note, tone

Example : There was a note of uncertainty in his voice.

Example : It ended on a sour note.
There was a note of gaiety in her manner.
He detected a note of sarcasm.

Example : He peeled off five one-thousand-zloty notes.

Synonyms : bank bill, bank note, banker's bill, banknote, bill, federal reserve note, government note, greenback

Example : His notes were appended at the end of the article.
He added a short notation to the address on the envelope.

Synonyms : annotation, notation

Example : A scholar of great eminence.

Synonyms : distinction, eminence, preeminence

Example : I had to co-sign his note at the bank.

Synonyms : note of hand, promissory note

Example : She observed that his presentation took up too much time.
They noted that it was a fine day to go sailing.

Synonyms : mention, observe, remark

Example : She noted that someone was following her.
Mark my words.

Synonyms : mark, notice

Example : Take note of this chemical reaction.

Synonyms : observe, take note

Example : She noted everything the teacher said that morning.

Synonyms : take down