Is “Overlay” a Scrabble word?

1.A piece of paper pasted upon the tympan sheet to improve the impression by making it stronger at a particular place.

2.(betting) Odds which are set higher than expected or warranted. Favorable odds.

3.A horse going off at higher odds than it appears to warrant, based on its past performances.

1.To lay, spread, or apply something over or across; cover.

2.To overwhelm; to press excessively upon.

3.To lie over (someone, especially a child) in order to smother it; to suffocate.