head off

British  

verb

1. to intercept and force to change direction

   to head off the stampede

2. to prevent or forestall (something that is likely to happen)

3. to depart or set out

   to head off to school

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head off Idioms  

1. Block the progress or completion of; also, intercept. For example, They worked round the clock to head off the flu epidemic, or Try to head him off before he gets home. [First half of 1800s] This expression gave rise to head someone off at the pass, which in Western films meant “to block someone at a mountain pass.” It then became a general colloquialism for intercepting someone, as in Jim is going to the boss's office—let's head him off at the pass.

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Example Sentences

The frequency and volume of flatulence is a major reason people quit healthy, fiber-rich diets, which can be key to heading off gastrointestinal disorders and colon cancer.

From The Wall Street Journal

Only 39, he took up the role with gusto, launching into an anti-crime drive that proved popular with the electorate but not enough to keep his head off the chopping block.

From Barron's

Both gambits are aimed at heading off a possible U.S. strike.

From The Wall Street Journal

"From there I can get a good job that will pay me more," says Abdul before heading off to speak to recruiters.

From BBC

Before heading off to the front, Shaman, his army call sign, was manning the stand of the "Berkut Military-Sports Cossack Club" in the shopping centre.

From Barron's