Aldis

noun

Al·​dis

ˈȯl-dəs

: a hand-carried signal lamp used to flash messages especially from ships and aircraft

Word History

Etymology

after Arthur C. W. Aldis †1953 British engineer and inventor

First Known Use

1944, in the meaning defined above

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