1. To cause water or other liquids to flow out:
* The plumber used a plunger to flush the clogged toilet.
* The heavy rain caused the river to flush its banks.
* She flushed the dirty water down the drain.
2. To become red in the face, often due to embarrassment:
* He flushed red when she asked him about his secret crush.
* The news report caused many viewers to flush with anger.
* Her cheeks flushed a bright pink after her workout.
3. To be aligned with something else:
* The new building flushed with the existing architecture.
* The doors on the cabinet flush with the surrounding walls.
* The countertop flushes with the cabinets.
4. To remove data from a computer's memory:
* The computer flushed the cache after a system update.
* The programmer flushed the database to ensure consistency.
5. To clean or purify:
* The doctor recommended drinking plenty of water to flush toxins from the body.
* The filter helps flush out impurities from the water.
* She used a mouthwash to flush out bacteria.
Note: The meaning of "flush" can vary depending on the context.