The phrasal verb "run off" is chiefly used in informal contexts. It typically denotes someone leaving a place quickly or suddenly, which can imply either a literal physical departure or an escape-like action. This phrasal verb is often used in storytelling or everyday conversations, for example,"He saw her and decided to run off," or "The mischievous child ran off before anyone noticed." Additionally, "run off" can refer to the process of making copies, such as in printing or photocopying, as in "I need to run off some copies before the meeting." Besides its usage in casual settings, "run off" can appear in more formal contexts when discussing environmental science, where it describes the draining of water from land into streams, especially relating to water pollution and erosion. This multiplicity of meanings underscores the need for context to determine the phrasal verb's exact connotation.
B1
PreIntermediate
1. To leave a place or person suddenly or secretly.
She decided to run off with her boyfriend without telling anyone.
The thief ran off before the police could catch him.
2. To produce or print something quickly.
She ran off 50 copies of the report for the meeting.
The machine can run off hundreds of pages in an hour.