under contract

:  in or into a position below or beneath something

:  below or short of some quantity, level, or limit

:  in or into a condition of subjection, subordination, or unconsciousness

:  below or beneath so as to be overhung, surmounted, covered, protected, or concealed by

:  subject to the authority, control, guidance, or instruction of

:  receiving or undergoing the action or effect of

:  lower in rank or authority :  subordinate

:  a binding agreement between two or more persons or parties

:  one legally enforceable

:  a business arrangement for the supply of goods or services at a fixed price

:  to bring on oneself especially inadvertently :  incur

:  to become affected with

:  to establish or undertake by contract

:  hired to execute a contract (see ¹contract 1a)