noun

• (real estate, informal) Clipping of bathroom.
  "The master bath has two sinks."
• (by extension) A substance or preparation in which something is immersed.
  "a bath of heated sand, ashes, steam, or hot air"

verb

• (transitive, Commonwealth) To wash a person or animal in a bath.
  "Somewhere to bath the baby: don't invest in a plastic baby bath. The bathroom handbasin is usually a much more convenient place to bath the baby. If your partner is more able, this could be a task he might take on as his, bathing the baby in a basin or plastic bown on the floor."
• (intransitive, informal, Commonwealth) To bathe (oneself); to have a bath.
  "“Oh, dear no, not me; I never bath, ’tis the cat has been bathing, in a warm sea bath; I’ll tell you how I manage: I bought a large pickle-jar, and so I have it filled every morning with hot sea water, proportionate to the thermometerical heat my finger can bear, and that I stile Tink-a-tink’s bath; in which I immerge him all but his head, for a quarter of an hour; and he looks so pretty, and receives so much benefit, you would be surprised.”"

noun

• (historical units of measure) A former Hebrew unit of liquid volume (about 23 L or 6 gallons).
  "Ye shall have just balances, and a just ephah, and a just bath. The ephah and the bath shall be of one measure, that the bath may contain the tenth part of an homer, and the ephah the tenth part of an homer: the measure thereof shall be after the homer."