# lighten up

idiom

Source: https://englishreference.com/idiom/lighten-up
Updated: 2026-08-10

## Meaning

To make (something) or to become less serious and more cheerful or casual; to relax.

## Examples

- You should lighten up and enjoy the party.
- He was so stressed about the presentation that his friend told him to lighten up and take a break.
- Although the situation was grave, she urged her colleagues to lighten up, reminding them that excessive worry would only hinder their progress.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.