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
The goal isn’t to separate the machine from the workforce, but to build an inclusive system where the two operate together, reinforcing each other’s strengths.
—
Priya Vijayarajendran, Forbes.com, 30 June 2025
Scaring a black bear can reinforce its natural fear of people and help keep it from lingering in neighborhoods and other areas where conflicts often arise.
—Stephen Underwood, Hartford Courant, 30 June 2025
As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage.
—Ca Wildfire Bot, Sacbee.com, 30 June 2025
The family also played a key role in commemorating the 80th anniversaries of D-Day and V-E Day, further reinforcing its role on both the national and international stage.
—Gabe Whisnant, MSNBC Newsweek, 30 June 2025
See All Example Sentences for reinforce
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Priya Vijayarajendran, Forbes.com, 30 June 2025
Scaring a black bear can reinforce its natural fear of people and help keep it from lingering in neighborhoods and other areas where conflicts often arise.
—Stephen Underwood, Hartford Courant, 30 June 2025
As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage.
—Ca Wildfire Bot, Sacbee.com, 30 June 2025
The family also played a key role in commemorating the 80th anniversaries of D-Day and V-E Day, further reinforcing its role on both the national and international stage.
—Gabe Whisnant, MSNBC Newsweek, 30 June 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 5 Jul. 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
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