Definition of overboil in US English:

overboil

verb

  • 1with object To boil for too long so as to overcook.

  • 2no object To boil over; to boil so as to overflow the pot, etc.

  • 3with object Of a liquid: to boil over so as to overflow (a vessel, etc.).

Origin

Late 16th century; earliest use found in Thomas Cogan (c1545–1607), physician. From over- + boil.

Pronunciation

overboil

/ˌəʊvəˈbɔɪl/