Definition of tissues:
(n) :
A sheet of absorbent paper, especially one that is made to be used as tissue paper, toilet paper or a handkerchief.
(n) :
(biology) A group of cells (along with their extracellular matrix if any) that are similar in origin and function together to do a specific job.
(n) :
Thin, woven, gauze-like fabric.
(n) :
A fine transparent silk material, used for veils, etc.; specifically, cloth interwoven with gold or silver threads, or embossed with figures.
(n) :
Absorbent paper as material.
(n) :
Web; texture; complicated fabrication; connected series.