definition of
[fissure]

[1] #1 fissure n. [crevice, cranny, crack, chap] a long narrow depression in a surface. wn

[2] #2 fissure v. break into fissures or fine cracks. wn

[3] #3 fissure n. [crack, cleft, crevice, scissure] a long narrow opening. wn

[4] #4 fissure n. (anatomy) a long narrow slit or groove that divides an organ into lobes. wn