square sail

1. 1.

   a four-sided sail set beneath a horizontal yard suspended at the middle from a mast

   Broadersail

Questions about square sail

What does square sail mean?

square sail means "a four-sided sail set beneath a horizontal yard suspended at the middle from a mast".

Is square sail a common word?

square sail is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.