The phrasal verb 'back out' is primarily used in informal speech, although it can appear in formal contexts, particularly in written communication such as agreements or contracts where commitments or plans are discussed. The phrase generally means to withdraw from a commitment, agreement, or arrangement. Common usage involves contexts where someone decides not to fulfill a promise or backs away from a previously agreed-upon decision, often to the disappointment or inconvenience of others involved. It is frequently used when referring to someone canceling plans or breaking a promise. The verb underscores the notion of retreating or abandoning an established course of action. While it is versatile, context and tone can imply anything from casual to serious ramifications, based on the initial agreement's importance.
B2
UpperIntermediate
1. To decide not to do something you previously agreed to do, especially not to proceed with a project or agreement.
He backed out of the deal at the last minute.
She promised to join the team but backed out before the first meeting.
2. To move backwards out of an area, particularly a parking space or driveway.
He had to back out of the driveway carefully to avoid hitting the fence.
The car was parked in such a way that I had to back out slowly.