ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
1. : the source or headwater of a stream
2. : a dammed up body of water (as for supplying a garden or mill) ; also : the height or quantity so retained
3.
a. : a large head ; especially : hydrocephalus
b. chiefly dialect : one with an excessively large head and usually subnormal intelligence