English Reference
adjective

constrained

adj.
US /kənˈstɹeɪnd/ UK /kənstɹˈeɪnd/ con·strained

  1. 01 B2 Upper Intermediate Academic

    limited or restricted by rules, space, or lack of money.

    kept within close bounds or restricted by external circumstances such as budget, space, or regulations.

    Simple

    The research team was constrained by a very small budget this year.

    In context

    The architect's design was severely constrained by the narrow plot of land and strict local building codes.

    Usage

    Often followed by the preposition 'by'.

  2. 02 C1 Advanced Formal

    not natural or free, often because you are forced to act a certain way.

    appearing forced, stiff, or unnatural due to external pressure or internal discomfort.

    Simple

    He gave a constrained smile when his rival won the award.

    In context

    The atmosphere during the negotiations remained constrained, with both parties choosing their words with extreme caution.

    Usage

    Frequently describes facial expressions, gestures, or social atmospheres.

In this crowded environment, each chain is constrained by the others around it.

Phys.org· 21 Aug 2026

Only 29% of the HOAs limited outdoor-light wattage, 19% required residents to maintain trees, 6% constrained use of fertilizers and 3% required native plants.

The Conversation· 3 Aug 2026
This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated