Meaning of the word "rein in" in English

What does "rein in" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

rein in

US /reɪn/
UK /reɪn/

Phrasal Verb

to control or limit something, especially something that is growing or increasing too much

Example:
The government needs to rein in spending.
She struggled to rein in her emotions.