The phrasal verb 'run out' is predominantly used in informal speech, though it can sometimes appear in formal contexts, particularly in writing related to business or resource management. Generally, 'run out' is employed to describe a situation where a supply of something is depleted or exhausted, such as 'running out of time' or 'running out of supplies.' This usage conveys urgency or scarcity, making it versatile in a variety of contexts, from everyday conversation about household items to strategic discussions in business settings. Additionally, 'run out' can metaphorically describe situations where patience, ideas, or motivation are exhausted. While straightforward in its primary meaning, 'run out' also appears extensively in idiomatic expressions and headlines, further attesting to its adaptability and common usage.
B1
PreIntermediate
1. To deplete a supply of something until there is nothing left.
We need to buy more milk before we run out.
The battery is about to run out; we need to charge the phone.
2. To expire or become invalid because its time limit has been reached.
My passport has run out, so I need to renew it before traveling.
The lease ran out last month, so we have to find a new place.