noun

• (UK, Australia, Ireland, New Zealand, sometimes Canada, rare in the US and the Philippines) A small, flat, baked good which is either hard and crisp or else soft but firm; a cookie.
  "Weighed myself at the gym and have hit 10st 8lb, a sure sign of things getting out of control—so I can’t even console myself with a chocolate biscuit."
• (chiefly Canada, US, rare in Scotland and Guernsey) A small, usually soft and flaky bread, generally made with baking soda, which is similar in texture to a scone but which is usually not sweet.
• (UK, Ireland, Philippines, Singapore, Malaysia) A cracker.
  "cheese and biscuits"
• (especially nautical) Any of several hard bread or breadlike foodstuffs, especially those formerly supplied to naval ships and armies, made with very little water, kneaded into flat cakes, and slowly baked, and which often became infested with weevils.
  "Near-synonyms: tack, bread"

verb

• (transitive) To fire (pottery) in a kiln, without a ceramic glaze.
• (New Zealand, intransitive) To take part in the sport of tubing, riding down a river on an inner tube.