Is KELLY a Wordle Word?

Yes. KELLY is a valid Wordle word.

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

What does KELLY mean?

A square or hexagonal pipe that is turned in order to rotate the rotary table of a drilling rig.
A roly-poly (toy).
Kelly green.“Heart's Desire—20 inch silk chiffon square—navy and shocking, grey and turquoise, brown and kelly, or green and violet, on white ground. $ 4.00 Matching contour belt […]”

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

Starter word rating: WeakIn the top 77% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 4 of 5Repeats L
Common letters: E, L

Hard-mode trap: 11 valid words fit the pattern _ELLY. 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.