noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A medieval Welsh unit of surface area equal to 11664 sq ft, or about ¼ acre. historical
2. 2
   Initialism of enhanced-radiation weapon (“neutron bomb”). abbreviation, alt-of, initialism
3. 3
   Acronym of explosive remnant of war. abbreviation, acronym, alt-of

Synonyms

All synonyms

acre

Etymology

Borrowed from Welsh erw.

Related phrases

square footsurface area

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.