- an agreement, covenant, or compact: We made a pact not to argue any more.
- an agreement or treaty between two or more nations: a pact between Germany and Italy.
- an agreement or compact between two or more parties, nations, etc, for mutual advantage
n.early 15c., from Old French pacte “agreement, treaty, compact” (14c.), from Latin pactum “agreement, contract, covenant,” noun use of neuter past participle of pacisci “to covenant, to agree, make a treaty,” from PIE root *pag- “fix, join together, unite, make firm” (cf. Sanskrit pasa- “cord, rope,” Avestan pas- “to fetter,” Greek pegnynai “to fix, make firm, fast or solid,” Latin pangere “to fix, to fasten,” Slavonic paž “wooden partition,” Old English fegan “to join,” fon “to catch seize”).