Under sail Meaning, Definition & Usage

Definitions
  1. . (Naut.) (a) With anchor up, and under the influence of sails; moved by sails; in motion. (b) With sails set, though the anchor is down. (c) Same as Under canvas (a), above. Totten.
Definitions
  1. having the sails spread.
  2. . (Naut.) (a) With anchor up, and under the influence of sails; moved by sails; in motion. (b) With sails set, though the anchor is down. (c) Same as Under canvas (a), above. Totten.

Webster 1913