Definition of "fissure" in English

noun

1. A long, narrow crack or opening made by breaking or splitting, especially in rock or earth.

2. (anatomy) A groove, deep furrow, elongated cleft or tear between body parts or in the substance of an organ.

3. (anatomy) A break or slit in tissue usually at the junction of skin and mucous membrane.

4. A state of incompatibility or disagreement.

verb

1. To split, forming fissures.