Definition of "yare"

[…] Dismount thy tuck, be yare in thy preparation, for thy assailant is quick, skillful and deadly.

c. 1595–1596 (date written), William Shakespeare, “A Midsommer Nights Dreame”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iv]

The lesser [ship] will come and go, leave or take, and is yare; whereas the greater is slow.

c. 1587-1612 (undated), Sir Walter Raleigh, letter to Prince Henry

Hey, my hearts! Cheerly, cheerly, my hearts! Yare, yare! Take in the topsail. Tend to th'Master's whistle. […]

1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene i]