Is MELDS a Wordle Word?

Yes. MELDS 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 MELDS mean?

To combine multiple similar objects into one“Much as America's motto celebrates melding many into one, South Africa's says that it doesn't matter what you look like — we can all be proud of our young country. - The New York Times, 26/02/2007 http//www.nytimes.com/2007/02/27/world/africa/27safrica.html?_r=1&oref=login”

In card games, especially of the rummy family, to announce or display a combination of cards.

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

Starter word rating: AverageIn the top 33% of all valid Wordle words for testing common letters.
Vowels: E
Unique letters: 5 of 5
Common letters: E, L

Hard-mode trap: 6 valid words fit the pattern ME_DS. 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.