Definitions:

1. characterized by or constituting a form of government in which power is held by one central authority adjective
   • a unitary as opposed to a federal form of government
2. having the indivisible character of a unit adjective
   • a unitary action
3. of or pertaining to or involving the use of units adjective
   • a unitary method was applied
4. relating to or characterized by or aiming toward unity adjective
   • the unitary principles of nationalism

Synonyms:

• one