To Flush

1. (transitive) To cause to take flight from concealment.
2. (intransitive) To take suddenly to flight, especially from cover.
3. (transitive) To cleanse by flooding with generous quantities of a fluid
4. (transitive) Particularly, to cleanse a toilet by introducing a large amount of water.
5. (intransitive) To become suffused with reddish color due to embarrassment, excitement, overheating, or other systemic disturbance, to blush.
6. (transitive) To cause to blush.
7. To cause to be full; to flood; to overflow; to overwhelm with water.
8. (transitive) To excite, inflame.
9. (intransitive, of a toilet) To be cleansed by being flooded with generous quantities of water.
10. (transitive, computing) To clear (a buffer) of its contents.
11. To flow and spread suddenly; to rush.
12. To show red; to shine suddenly; to glow.
13. (masonry) To fill in (joints); to point the level; to make them flush.
14. (mining, intransitive) To operate a placer mine, where the continuous supply of water is insufficient, by holding back the water, and releasing it periodically in a flood.
15. (mining) To fill underground spaces, especially in coal mines, with material carried by water, which, after drainage, constitutes a compact mass.
16. (intransitive, transitive) To dispose or be disposed of by flushing down a toilet

Usage notes

In sense “turn red with embarrassment”, blush is more common. More finely, in indicating the actual change, blush is usual – “He blushed with embarrassment” – but in indicating state, flushed is also common – “He was flushed with excitement”.

Synonyms

• (turn red with embarrassment): blush