Definition of overswell in US English:

overswell

verb

  • 1no object And with object. To swell excessively.

  • 2with object Especially of a body of water: to swell so as to spill over or beyond (a bank, barrier, limit, etc.). Also occasionally without object. Now rare (poetic in later use).

Origin

Mid 16th century; earliest use found in Image of Idlenesse. From over- + swell.

Pronunciation

overswell

/ˌəʊvəˈswɛl/