the amount by which a sum of money falls short of the required amount.

the amount by which expenditures or liabilities exceed income or assets.

a lack or shortage; deficiency.

a disadvantage, impairment, or handicap

The team's major deficit is its poor pitching.

a loss, as in the operation of a business.

noun

enough , excess , plenty , superfluousness

noun

arrears , dead horse , defalcation , default , deficiency , due bill , dues , inadequacy , in hock , insufficience , insufficiency , in the hole , in the red , lack , loss , paucity , red ink , scantiness , shortcoming , shortfall , underage , defect , poverty , scantness , scarceness , scarcity , disadvantage , impairment , shortage