A sudden, usually temporary increase in number or quantity: The baby boom created a bulge in school enrollment.
An advantage.
v.
bulged, bulg·ing, bulg·es
v.
tr. To cause to curve outward. v.
intr.
To curve outward.
To swell up.
To stick out; protrude.
To be filled or overfilled: pockets bulging with coins.
[Middle English, pouch, from Old French bulge, bouge, from Latin bulga, bag, of Celtic origin; see bhelgh- in Indo-European roots.] bulg'i·ness n., bulg'y adj.
Synonyms: These verbs mean to curve, spread, or extend outward past the normal or usual limit: a wallet bulging with money; expenses ballooning; a sail bellying in the wind; a pipe jutting from his mouth; overhanging eaves; projecting teeth; a head protruding from the window.
[buhlj] 
noun, verb, bulged, bulg⋅ing.