'Yardarm' definitions:

Definition of 'yardarm'

(from WordNet)
noun
Either end of the yard of a square-rigged ship

Definition of 'Yardarm'

From: GCIDE
  • Yardarm \Yard"arm`\, n.
  • 1. (Naut.) Either half of a square-rigged vessel's yard[6], from the center or mast to the end. [1913 Webster]
  • Note: Ships are said to be yardarm and yardarm when so near as to touch, or interlock yards. [1913 Webster]
  • 2. (Naut.) The portion of a yard[6] outboard of the slings, often called the outer quarter. [RDH]
  • Note: A yard[6] is considered to have four unequal quarters, two quarters extending from the mast to the slings on each side, and two smaller outer quarters outboard of the slings. [RDH]