noun

1. A deal to swap goods or services.

2. A conservative; originally tied to Nicaraguan counter-revolutionaries.

3. An entry (or account) that cancels another entry (or account).

   “The sum for each contra account is shown in the last column.”

verb

1. To undo; to reverse.

   “to contra a position (an entry)”

adverb

1. Contrary to something

preposition

1. Against; contrary or opposed to; in opposition or contrast to

Synonyms: against, anti