definition of
fat

[1] #1 fat a. having an (over)abundance of flesh; "he hadn't remembered how fat she was". wn

[2] #2 fat n. a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides); "pizza has too much fat". wn

[3] #3 fat s. having a relatively large diameter; "a fat rope". wn

[4] #4 fat n. [adipose tissue, fatty tissue] a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs; "fatty tissue protected them from the severe cold". wn

[5] #5 fat v. [fatten, flesh out, fill out, plump, plump out, fatten out, fatten up] make fat or plump; "We will plump out that poor starving child". wn