Is NOTES a Wordle Word?

Yes. NOTES is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

Plurals ending in S are almost never chosen as Wordle answers.

What does NOTES mean?

/nəʊts/

4 more noun definitions

To notice with care; to observe; to remark; to heed.“If you look to the left, you can note the old cathedral.”
To record in writing; to make a memorandum of.“We noted his speech.”
To denote; to designate.“The modular multiplicative inverse of x may be noted x-1.”

3 more verb definitions

To annotate.
To set down in musical characters.
To record on the back of (a bill, draft, etc.) a refusal of acceptance, as the ground of a protest, which is done officially by a notary.

That which is needed or necessary; business; duty; work.
The giving of milk by a cow or sow; the period following calving or farrowing during which a cow or sow is at her most useful (i.e. gives milk); the milk given by a cow or sow during such a period.

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: GoodIn the top 6% of all valid Wordle words for testing common letters.
Vowels: O, E
Unique letters: 5 of 5
Common letters: O, T, E

Hard-mode trap: 10 valid words fit the pattern _OTES. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.