Wiktionary
vb. (context idiomatic English) to complete; to create details from a basic outline, structure or skeleton
WordNet
v. make fat or plump; "We will plump out that poor starving child" [syn: fatten, fat, fill out, plump, plump out, fatten out, fatten up]
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing; "She elaborated on the main ideas in her dissertation" [syn: elaborate, lucubrate, expatiate, exposit, enlarge, expand, expound, dilate] [ant: abridge]
become round, plump, or shapely; "The young woman is fleshing out" [syn: round, fill out]
Usage examples of "flesh out".
He took no chunks of flesh out of this poor body, as I suppose he could have.
Her hands were locked together, her fingers twisting and twining so tightly that she seemed to be trying to squeeze the flesh out from between the bones.
The forest wove flesh out of air, soil, water, and sun and blanketed the ground in a foot of new humus each day.