1a long, narrow opening or line of breakage made by cracking or splitting, especially in rock or earth:the bacteria survive around vents or fissures in the deep ocean floor
Anatomy a long, narrow opening, e.g. any of the spaces separating convolutions of the brain.
2a state of incompatibility or disagreement:a fissure between philosophy and reality
verb
[with object] (usually as adjective fissured)
split or crack (something) to form a long, narrow opening:low cliffs of fissured Silurian rock
Origin:
late Middle English: from Old French, or from Latin fissura, from findere 'to split'
fissure in other Oxford dictionaries
Definition of fissure in the US English dictionary
