Is JAILS a Wordle Word?

Yes. JAILS 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 JAILS mean?

/dʒeɪlz/

A place or institution for the confinement of persons held in lawful custody or detention, especially for minor offenses or with reference to some future judicial proceeding.
Confinement in a jail.
The condition created by the requirement that a horse claimed in a claiming race not be run at another track for some period of time (usually 30 days).

2 more noun definitions

In dodgeball and related games, the area where players who have been struck by the ball are confined.
(FreeBSD) A kind of sandbox for running a guest operating system instance.

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

Starter word rating: WeakIn the top 43% of all valid Wordle words for testing common letters.
Vowels: A, I
Unique letters: 5 of 5
Common letters: A, I, L
Rare letters: J

Hard-mode trap: 13 valid words fit the pattern _AILS. 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.