1) the action of sucking; the process of removing air etc to produce a vacuum and to force in liquid or dust; a similar process producing a vacuum that causes two surfaces to stick together (suction)
to work or act together in order to bring about a result
aid, assist
a place where two or more things have been joined together; to come together
unite
to form (parts) into one; unite
unite
(to cause people, groups, things) to become one; to act or work together
combine; join together
