a Gestalt principle of organization holding that (other things being equal) objects or events that are near to one another (in space or time) are perceived as belonging together as a unit
(physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons
be owned by; be in the possession of; "This book belongs to me"
be classified with; "The whales belong among the mammals"
be suitable or acceptable; "This student somehow doesn't belong"
be in the right place or situation; "Where do these books belong?"; "Let's put health care where it belongs--under the control of the government"; "Where do these books go?"