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Glite Dictionary
to rein in

to rein in

51 4.6
To keep someone or something under control, for example by limiting spending
  • phrasal verb
  • /reɪn ɪn/
: contener
  • I learned that I am a creative and I very much need people to rein me in on that element.
  • efforts to rein in
  • try to rein in
  • attempt to rein in

You know, I think holding that job can make people rein in their vision a lot.

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Examples

  • Officers have struggled for years to rein in the violence.

    The Hate U Give (2018)

  • I can always rein him in later.

    Find Me Guilty (2006)

  • It's still live, but they have reined it in a lot, so this could not happen again.

    Computerphile

  • You have to rein him in.

    The Roses (2025)

  • You really need to learn to rein it in a little bit.

    Itty Bitty Titty Committee (2007)

  • So you have to rein in the Congress's spending, which has caused this.

  • Moreover, it was again time to use congressional oversight to rein in the agency.

    Academic text (2009)

  • A slate of conservatives won office, aiming to rein in spending so they could cut taxes.

    Academic text (1997)

  • Elsewhere, however, communities are still struggling to rein in reactive nitrogen.

    Academic text (2012)

  • The teacher needed to rein in the students' excitement during the assembly.

Synonyms

to restrain
vsto rein in
233 4.6

Hold a person or thing so it cannot move freely

is gentler meaning limit or guide rather than necessarily stopping movement
to hold down
vsto rein in
88 3.2

To keep something low and stop it from getting bigger

is about controlling or limiting broadly not only preventing excess
to tame
vsto rein in
81 3.0

To make something less wild or strong

is more immediate and temporary control rather than long-term gentle domestication
to curb
vsto rein in
74 3.5

To limit or control something to stop it getting worse

is used for general control rather than targeting only undesirable things
to rein
vsto rein in
58 4.9

To control and hold back people or things

is the phrasal form used specifically for limiting or slowing actions
to subdue
vsto rein in
54 5.5

To bring a person or thing under control, often by force

is less violent and more about simple limiting or slowing
to constrain
vsto rein in
53 5.6

To limit what someone can do or how they can act

is more about voluntary control or slowing not forcing choices
to check
vsto rein in
20 3.7

Stop something from growing or spreading

is more about active control rather than only stopping growth
to clamp down on
vsto rein in
14 5.3

Take strong action to stop something bad or illegal

is generally milder focusing on limiting rather than harsh enforcement
to throttle
vsto rein in
10 7.5

To reduce or control how much of something is allowed

is a more general control not only about limiting quantities or access
to draw rein
vsto rein in
  • Literature
1 8.4

To stop or slow progress by controlling it, like a rider pulling the straps that guide a horse

is more about limiting or slowing rather than always stopping

Antonyms

to release
∞ 1.8

To let someone or something go free from being held

to loosen
185 1.0

Make something less tight so it can move or open

How Controlling

to crack down
82 3.8
to clamp down
20 4.2
to rein in
51 4.6
to limit
465 2.1
to moderate
41 4.4
to allow
∞ 1.0

Surface Forms

rein in infinitive
reined in past
reined in past participle
reining in present participle
reins in third person singular

Morphology

rein + in

The meaning 'to control or limit' is directly derivable from combining 'rein' (an instrument or method for guiding/control) with 'in' (toward or within bounds): together they evoke pulling something back or keeping it within limits. This compositional metaphor follows normal English particle-verb patterns and is cross-linguistically common, so a B1 learner who knows both constituents should be able to infer the meaning.

Etymology

The phrasal verb rein in comes from riding a horse: when you pull the rein and bring the horse in, you slow or stop it to control it. So today rein in means 'to control' or 'to limit' someone or something.