reinforce
verb
re·in·force
ˌrē-ən-ˈfȯrs 
variants
or less commonly reenforce
reinforced also reenforced; reinforcing also reenforcing; reinforces also reenforces
1
: to strengthen by additional assistance, material, or support : make stronger or more pronounced
reinforce levees
reinforce the elbows of a jacket
reinforce ideas
2
: to strengthen or increase by fresh additions
reinforce our troops
were reinforcing their pitching staff
3
: to stimulate (a subject, such as an experimental animal) by reinforcement (see reinforcement sense 3)
also
: to encourage (a response) by reinforcement
: to seek or get reinforcements
Examples of reinforce in a Sentence
The captain sent out another squad to reinforce the troops.
Our camp is reinforced with supplies flown in by helicopter.
The levees will need to be reinforced.
The bad weather forecast only reinforces our decision to leave early tomorrow.
Some critics say that the movie reinforces negative stereotypes about the military.
We do our best to reinforce good conduct in the classroom.
Recent Examples on the Web
This year, State Farm joined as a presenting sponsor, reinforcing its ongoing commitment to the Latin community.
—
Quincy Green, Billboard, 30 Oct. 2025
Insights from this new initiative will be used to inform future Bezos Earth Fund investments in materials science, manufacturing innovation and supply chain transformation, while also reinforcing CFDA’s leadership in sustainability, education and creative advancement.
—Rosemary Feitelberg, Footwear News, 30 Oct. 2025
Since then, most nuclear powers have observed a moratorium, reinforced by the 1996 Comprehensive Nuclear Test-Ban Treaty (CTBT).
—Joshua Rhett Miller, MSNBC Newsweek, 30 Oct. 2025
As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage.
—Ca Wildfire Bot, Sacbee.com, 30 Oct. 2025
See All Example Sentences for reinforce
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Quincy Green, Billboard, 30 Oct. 2025
Insights from this new initiative will be used to inform future Bezos Earth Fund investments in materials science, manufacturing innovation and supply chain transformation, while also reinforcing CFDA’s leadership in sustainability, education and creative advancement.
—Rosemary Feitelberg, Footwear News, 30 Oct. 2025
Since then, most nuclear powers have observed a moratorium, reinforced by the 1996 Comprehensive Nuclear Test-Ban Treaty (CTBT).
—Joshua Rhett Miller, MSNBC Newsweek, 30 Oct. 2025
As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage.
—Ca Wildfire Bot, Sacbee.com, 30 Oct. 2025
See All Example Sentences for reinforce
Cite this Entry
“Reinforce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reinforce. Accessed 1 Nov. 2025.
Copy CitationKids Definition
reinforce
verb
re·in·force
ˌrē-ən-ˈfō(ə)rs
-ˈfȯ(ə)rs
1
: to strengthen by additional assistance, material, or support
reinforce the elbows of a jacket
reinforce the argument with facts
2
: to strengthen or increase by fresh additions
were reinforcing their pitching staff
reinforce our troops
3
: to stimulate (a person or animal) with a reinforcer
also
: to increase the frequency of (a response) with a reinforcer
Medical Definition
reinforce
transitive verb
re·in·force
ˌrē-ən-ˈfō(ə)rs, -ˈfȯ(ə)rs
reinforced; reinforcing
1
: to strengthen by additional material or support : make stronger
reinforced with vitamins
2
: to stimulate (as an experimental animal or a student) by reinforcement
also
: to encourage (a response) by reinforcement
Love words? Need even more definitions?
Merriam-Webster unabridged
Share