en ‧ ti ‧ ty AC /ˈentəti, ˈentɪti/ BrE AmE noun ( plural entities ) [countable]
[ Date: 1500-1600 ; Language: Medieval Latin ; Origin: entitas , from Latin ens 'thing that exists' , from esse 'to be' ]
formal something that exists as a single and complete unit ⇨ being :
The mind exists as a separate entity.
Good design brings a house and garden together as a single entity.