[fis.sure] n [ME, fr. MF, fr. L fissura, fr. fissus] (14c) 1: a narrow opening or crack of considerable length and depth usu. 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 usu. at the junction of skin and mucous membrane
3: a separation or disagreement in thought or viewpoint: schism "~s in a political party"
[2]fissure vb fis.sured ; fis.sur.ing vt (1656): to break into fissures: cleave ~ vi: crack, divide