n.
Pronunciation: ' fi-sh ə r
Function: noun
Etymology: Middle English, from Middle French, from Latin fissura, from fissus
Date: 14th century
1 : a narrow opening or crack of considerable length and depth usually occurring from some breaking or parting
2 a : a natural cleft between body parts or in the substance of an organ b : a break or slit in tissue usually at the junction of skin and mucous membrane
3 : a separation or disagreement in thought or viewpoint : SCHISM < fissure s in a political party>