Deficiency in amount or quality; a falling short; lack; as, a deficit in taxes, revenue, etc.
- Inadequacy or insufficiency: a deficit in grain production.
- A deficiency or impairment in mental or physical functioning.
- An unfavorable condition or position; a disadvantage: rallied from a three-game deficit to win the playoffs.
- The amount by which a sum of money falls short of the required or expected amount; a shortage: large budget deficits.
- A business loss.