/ pækt; NAmE / noun
pact (between A and B) | pact (with sb) (to do sth) a formal agreement between two or more people, groups or countries, especially one in which they agree to help each other :
a non-aggression pact
They have made a pact with each other not to speak about their differences in public.
a suicide pact (= an agreement by two or more people to kill themselves at the same time)
••
WORD ORIGIN
late Middle English : from Old French , from Latin pactum something agreed, neuter past participle (used as a noun) of paciscere agree.