leatherjacket

noun

1

a

: a filefish (family Monacanthidae)

b

or less commonly leather jack : any of several fishes (genus Oligoplites) of the family Carangidae having the scales reduced and embedded in the skin

especially : a common fish (O. saurus) of both coasts of tropical America

2

: any of several Australian trees with very tough close smooth bark

especially : coachwood sense 1a

3

Australia : a johnnycake pan-fried or baked in hot ashes

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now