hydro

(noun, adjective)

adjective

1. hydroelectric

noun

1. (uncountable) hydroelectric power

2. (Canada, uncountable) electrical power supply; specifically electrical power provided by a utility (as a publicly-owned one).

- I won't have lights until my house gets the hydro turned on.

3. (Britain, countable, dated) A spa.

4. (countable, aviation, obsolete) Abbreviation of hydroaeroplane.