deficit

(noun) the property of being an amount by which something is less than expected or required. Synonyms: shortage, shortfall. Example: "New blood vessels bud out from the already dilated vascular bed to make up the nutritional deficit."

(noun) a deficiency or failure in neurological or mental functioning. Examples: "The people concerned have a deficit in verbal memory." "They have serious linguistic deficits."

(noun) (sports) the score by which a team or individual is losing.

(noun) an excess of liabilities over assets (usually over a certain period). Example: "Last year there was a serious budgetary deficit."