deficit

noun

def·​i·​cit ˈde-fə-sət 

British also di-ˈfi-sət

or ˈdē-fə-sət

1

a(1)

: deficiency in amount or quality

a deficit in rainfall

(2)

: a lack or impairment in an ability or functional capacity

cognitive deficits

a hearing deficit

b

: disadvantage

scored two runs to overcome a 2–1 deficit

2

a

: an excess of expenditure over revenue

facing a deficit of $3 billion

raise taxes to help reduce the budget deficit

b

: a loss (see loss sense 4b) in business operations

the year's operating deficit

Synonyms of deficit

• shortage
• lack
• deficiency

Examples of deficit in a Sentence

The government is facing a deficit of $3 billion.

We will reduce the federal budget deficit.

The team overcame a four-point deficit to win the game.

She has a slight hearing deficit in her left ear.

Recent Examples on the Web

That loss of independence could spook bond markets since it could be seen as the Fed financing the deficit or allocating credit to certain sectors preferred by politicians — actions it has already been accused of taking through its various asset purchases. —Steve Liesman,matt Peterson, CNBC, 4 May 2026

San Antonio won Game 3 on the road in Wembanyama’s absence, came back from a 19-point deficit in Game 4 and cruised in Game 5. —Dan Santaromita, New York Times, 4 May 2026

The Productivity Paradox The cruel irony of America’s sleep deficit is that overwork undermines the output it’s meant to produce. —Tristan Bove, Fortune, 4 May 2026

The Wild turned a corner scrum on the Avs’ side of the ice into a loose puck in front of Wedgie’s crease, and Minnesota’s Marcus Johansson slipped it past the Avs’ flailing netminder to trim the deficit to 3-1. —Sean Keeler, Denver Post, 4 May 2026

Word History

Etymology

borrowed from French déficit, going back to Middle French, "item lacking in an inventory," borrowed from Latin dēficit "it is lacking," 3rd person singular present indicative of dēficere "to be lacking, run short, fail" — more at deficient

First Known Use

1782, in the meaning defined at sense 1a(1)

Phrases Containing deficit

• attention deficit disorder
• attention-deficit hyperactivity disorder
• deficit spending
• trade deficit

Kids Definition

deficit

noun

def·​i·​cit ˈdef-ə-sət 

: a deficiency in amount

especially : an excess of expenses over income

Medical Definition

deficit

noun

de·​fi·​cit

ˈdef-(ə-)sət; British also di-ˈfis-ət, ˈdē-fə-sət

: a deficiency of a substance

a potassium deficit

also : a lack or impairment of a functional capacity

cognitive deficits