a long, narrow strap attached at one end to a horse's bit, typically used in pairs to guide or check a horse while riding or driving, control or guidance, especially when restraining freedom of action

rein in, on a long rein, shorten the reins

give someone free rein, take up the reins, keep a tight rein on something

Formal and Informal Expressions of rein

In different contexts, you can replace 'rein' with suitable alternatives. In a more formal setting, 'control, guidance' is apt. In informal speech or writing, 'hold, leash' is a commonplace synonym.

rein: Explore its Definition & Usage

rein Definition

1a long, narrow strap attached at one end to a horse's bit, typically used in pairs to guide or check a horse while riding or driving
2control or guidance, especially when restraining freedom of action

Using rein: Examples

Take a moment to familiarize yourself with how "rein" can be used in various situations through the following examples!

Example
She pulled on the reins to stop the horse.
Example
The company needs to keep a tight rein on expenses.
Example
Parents should exercise some rein over their children's activities.
Example
He gave his imagination free rein and wrote a fantastic story.

rein Synonyms and Antonyms

Synonyms for rein

Antonyms for rein

Idioms Using rein

rein in
to control or limit something that is becoming difficult to manage
Example
The company had to rein in its spending after it went bankrupt.
on a long rein
with a lot of freedom or independence
Example
The new boss allowed her employees to work on a long rein, giving them more autonomy than before.
shorten the reins
to increase control or limit freedom of action
Example
The coach had to shorten the reins on his players after they started making too many mistakes.

Phrases with rein

give someone free rein
allow someone complete freedom of action
Example
The new manager was given free rein to make changes in the department.
take up the reins
assume control or responsibility
Example
After the CEO resigned, the COO took up the reins of the company.
keep a tight rein on something
exercise strict control over something
Example
The government needs to keep a tight rein on inflation.

Origins of rein

from Old English 'rēn', meaning 'strap or thong for guiding a horse'

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Summary: rein in Brief

The term 'rein' [reɪn] refers to a long, narrow strap used to guide or check a horse while riding or driving, or control or guidance in general. It can be used in phrases like 'give someone free rein,' meaning to allow complete freedom of action, or idioms like 'rein in,' meaning to control or limit something that is becoming difficult to manage.