noun

• (strictly) An adult female of the species Bos taurus, especially one that has calved.
  "The whole herd is out to pasture right now — the cows, calves, and heifers are out back, and the bulls are down by the creek."
• (loosely or informal) Any member of the species Bos taurus that is not of a bucking breed or fighting breed, regardless of sex or age, including bulls and calves.
  "We saw lots of cows at the farm show, including some surprisingly gigantic bulls."
• (uncommon, uncountable) Beef: the meat of cattle as food.
  "The only meat I eat is cow."
• (uncommon) Any bovines or bovids generally, including yaks, buffalo, etc.

verb

• (transitive, chiefly passive voice) To intimidate; to daunt the spirits or courage of.
  "Con artists are not cowed by the law."

noun

• (UK, dialect) A chimney cowl.
  "Who could live to gaze from day to day on bricks and slates, who had once felt the influence of a scene like this? Who could continue to exist, where there are no cows but the cows on the chimneypots; nothing redolent of Pan but pan-tiles; […]"

noun

• (astronomy) LFBOT: Synonym of luminous fast blue optical transient.