Contractual (adjective)

1. Of or relating to a contract or contracts.
2. Established or governed by a contract.

Origin:

From contract + -ual.

Examples:

1. The contractual obligation required the company to pay the employee a bonus.
2. The contractual agreement between the two parties specified the terms and conditions of their partnership.
3. The employee was in breach of the contractual terms by not meeting the deadline.
4. The contractual rights and responsibilities of the parties were outlined in the document.
5. The contractual arrangement allowed for flexible working hours.