noun

• (uncountable) A mass of mixed ingredients reduced to a soft pulpy state by beating or pressure; a mass of anything in a soft pulpy state.
• (brewing) Ground or bruised malt, or meal of rye, wheat, corn, or other grain (or a mixture of malt and meal) steeped and stirred in hot water for making the wort.
• (chiefly UK) Mashed potatoes.
• (obsolete) A mess; trouble.
  "For your vows and oaths, Or I doubt mainly, I shall be i' the mash " too"

verb

• (transitive) To convert into a mash; to reduce to a soft pulpy state by beating or pressure
  "We had fun mashing apples in a mill."
• (transitive) In brewing, to convert (for example malt, or malt and meal) into the mash which makes wort, by mixing it with hot water.
• (transitive, UK, chiefly Northern England, Lancashire, Yorkshire) To prepare a cup of tea in a teapot; to brew (tea).
  "He took the kettle off the fire and mashed the tea."
• (ambitransitive) To press down hard (on).
  "to mash on a bicycle pedal"

noun

• (obsolete) A mesh.

noun

• (obsolete) An infatuation, a crush, a fancy.
• (obsolete) A dandy, a masher.
• (obsolete) The object of one’s affections (regardless of sex).