English Reference
verb

reinforce

v.
US /ˌɹiɪnˈfɔɹs/ UK /ɹˌiːɪnfˈɔːs/ re·in·force UK spelling reinforces

  1. 01 B2 Upper Intermediate

    to make a structure or object stronger by adding more material to it.

    to strengthen a physical object or structure by adding extra support or material. Transitive; requires a direct object.

    Simple

    The workers had to reinforce the old bridge with steel beams before heavy trucks could cross.

    In context

    Engineers decided to reinforce the concrete foundations after discovering that the soil was more unstable than the initial surveys had suggested.

  2. 02 B2 Upper Intermediate Academic

    to make an idea, belief, or feeling stronger.

    to provide additional support for a concept, argument, or belief, making it more convincing or established.

    Simple

    The latest news will only reinforce her opinion that the plan is a bad idea.

    In context

    The professor presented several case studies to reinforce the theory that economic stability is directly linked to high literacy rates.

  3. 03 B2 Upper Intermediate Academic

    to encourage a specific habit or way of acting by rewarding it.

    to strengthen a behavioral response by providing a stimulus or reward following the action.

    Simple

    You can reinforce good behavior in a dog by giving it a small treat.

    In context

    Positive feedback from managers can effectively reinforce a culture of collaboration and transparency within the workplace.

Usage mutually reinforce · reinforce conclusion · reinforce idea

It would allow the party to reclaim a state it lost in 2022 and reinforce its position in a region central to the president’s political power.

Al Jazeera· 14 Aug 2026

But when similar decisions are repeated thousands of times across schools and other organizations, they can reinforce the unequal division of caregiving responsibilities that already exists within many families.

The Conversation· 4 Aug 2026

From re- + inforce.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated