Meanings

reduction (of a fraction to its lowest terms)

freight or carriage contract

unilateral contract

treaty of commerce and navigation

reciprocal treaty

collective agreement

deposit

greatest common divisor

secret agreement

amity treaty

unequal treaty

a broken promise

Kellogg-Briand Pact (1928)

an onerous contract

insurance contract

social-contract theory

security treaty (esp. US-Japan Security Treaty)

conclusion of a contract

treaty power

chemical weapons ban treaty