noun

• (nautical) A piece of fabric attached to a boat and arranged such that it causes the wind to drive the boat along. The sail may be attached to the boat via a combination of mast, spars and ropes.
  "When we haue laught to ſee the ſailes conceiue / And grow big bellied with the wanton winde; […]"
• (nautical, uncountable) The concept of a sail or sails, as if a substance.
  "Take in sail: a storm is coming."
• (uncountable) The power harnessed by a sail or sails, or the use of this power for travel or transport.
• (dated, plural "sail") A sailing vessel; a vessel of any kind; a craft.
  "Twenty sail were in sight."

verb

• (intransitive) To set sail; to begin a voyage.
  "We sail for Australia tomorrow."
• (intransitive) To move briskly but sedately.
  "The duchess sailed haughtily out of the room."
• (card games, transitive) To deal out (cards) from a distance by impelling them across a surface.
  "He would sit his hat across the room, and we would sail cards into it."