To exist in a certain manner or relation, -- whether as a
   reality or as a product of thought; to exist as the subject of a
   certain predicate, that is, as having a certain attribute, or as
   belonging to a certain sort, or as identical with what is specified, --
   a word or words for the predicate being annexed; as, to be happy; to be
   here; to be large, or strong; to be an animal; to be a hero; to be a
   nonentity; three and two are five; annihilation is the cessation of
   existence; that is the man.