noun

• (US slang, now rare) A bachelor.
• (New Zealand) A small hut, epecially for a man living alone.
• (New Zealand) Now specifically, a holiday home, typically a small, simple house of one or two rooms on the beach.
  "She stops the car by an ochre-coloured bach at the end of the beachline, by the shelter of a massive thicket of African thorn."

verb

• (Canada, US, Australia, New Zealand, now rare) To live as a bachelor; (chiefly of a man) to live without women, and do one's own cooking, housekeeping etc.
  "I hurried home to the tent—I was batching with a carpenter."

noun

• (colloquial) Clipping of bachelorette.
  "When I ask people how spending money makes them feel, so many of them respond, "Guilty." ¶ They'll give an example of how a rough day at the office led to buying a pair of shoes online or how they got a little carried away at their friend's bach party in Vegas."

name

• (music) Johann Sebastian Bach, a German organist and composer.