shake hands

verb

an instance of shaking hands; a handshake
“Many a shake hands did I get from the neighbours’ sons, wishing me joy”
“He exchanged greetings with his rival, but their shake-hands was rather a cold one, and each looked the other askance, as if distrust was in their hearts.”

To grasp another person's hands as an expression of greeting, farewell, agreement, etc.
“Gerald was enthusiastic. After a while they shook hands, it being time to separate. And for a long time Selwyn sat there alone in the visitors' room, absent-eyed, facing the blazing fire of cannel coal.”
“Shaking hands is probably the most common form of social touch in the U.S., and it’s thought to have originated many centuries ago as assurance that neither party was carrying a weapon.”
To part, to say farewell.
“⁠But thou and I have shaken hands, ⁠Till growing winters lay me low; ⁠My paths are in the fields I know, And thine in undiscover’d lands.”