■ adjective engaging readily with other people.
↘marked by friendliness.
■ noun
1》 historical an open carriage with facing side seats.
2》 historical a tricycle with two seats side by side.
3》 chiefly Brit. an S-shaped couch for two people who sit partially facing each other.
4》 US dated an informal social gathering.
Derivatives
sociability noun
~ness noun
sociably adverb
Origin
C16: from Fr., or from L. sociabilis , from sociare 'unite', from socius 'companion'.