Contractual means set out in a binding written agreement. A contractual obligation, contractual terms, contractual rights.
It marks the difference between what somebody must do and what they merely ought to, since a contractual obligation can be sued on. Contractual terms may be express or implied, and implied ones are read in by law.
1adjectivecontractualSet out in a binding written agreement.
“Staff have a contractual right to thirty days' holiday a year.”
contractual is a quality.
From contract plus -ual, from Latin contractus, a drawing together.
Latin
contractus
English, today
contractual
Morphologically contract + ual, from Latin contractus + -al.
Etymology from Wiktionary, CC BY-SA