noun

• (obsolete) A mutual agreement, a covenant.
• (Scotland, historical) A market fair, especially a recurring one held on a schedule, where livestock sales took place.

verb

• (intransitive) To make a tryst; to agree to meet at a place.
• (transitive) To arrange or appoint (a meeting time etc.).
• (intransitive) To keep a tryst, to meet at an agreed place and time.
  "He said he was jealous, and craved something to ease his care. 'It's but a small thing I ask,' says he, 'but it will make me a happy man, and nothing ever shall come atween us. Tryst wi' me for Beltane's E'en on the Sker sands, at the green link o' the burn where the sands begin, on the ebb o' the tide when midnight is by, but afore cockcrow. For,' said he, 'that was our forbears' tryst for true lovers, and wherefore no for you and me?'"