Top Definition
1.common boys name that refers to the ocean.

Boys with this are refered to as brainy, and geeky, but at the same time, usually very cute.

2. A very good looking individual that is connected to the water in some way
whoo.....isnt Kainalu like the hottest person you ever met
by bob11232 August 28, 2007
Literally means "ocean wave" in the Hawaiian language.
We paddled out and surfed some big powerful kainalu today.
by Shay G February 12, 2010
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