Definition of water budget in US English:

water budget

noun

  • 1Heraldry. = water bouget.

  • 2= water bouget. Now historical and rare.

  • 3Biology. The relationship between water intake and water loss in an organism, ecosystem, etc.

Origin

Mid 16th century; earliest use found in Gerard Legh (d. 1563), heraldic writer. From water + budget.

Pronunciation

water budget

/ˈwɔːtə ˌbʌdʒɪt/