Pointing out a contrast, or denoting a particular thing or person different from some other specified; -- used as a correlative adjective, with or without the, Being a single entity, unit, object, or living being, Being the only individual of a specified or implied kind, noun_ The cardinal number, represented by the symbol 1, designating the first unit in a series, The first whole number, consisting of a single unit; unity, transitive verb_ obsolete To cause to become one; to gather into a single whole; to unite; to assimilite