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

How the change happened For the budget year that started July 1, the city was facing a deficit. — Theresa Clift, Sacbee.com, 16 July 2026

The irrepressible Albiceleste overcame a 1-0 deficit against England in Wednesday’s semifinal, equalizing in the 85th minute and knocking in a go-ahead goal in extra time to send Argentina to its second consecutive World Cup final. — Sara Germano, Sportico.com, 15 July 2026

For example, Gramm-Rudman-Hollings, perhaps the most serious attempt to eliminate fiscal follies, promised to gradually reduce federal deficits until 1991, when a balanced budget would be achieved. — Steve H. Hanke, Fortune, 15 July 2026

Each morning on Cuban state TV, a presenter who clearly has the worst job on the island, is tasked with forecasting the daily power deficit in the same way the local news in other countries reports the weather or traffic. — Patrick Oppmann, CNN Money, 15 July 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