v.1. To cleanse something by using water or other liquid to remove what is inside it: Wash out the cup before you use it. I washed out my hair. The trash can smelled, so I washed it out.
2. To remove something by washing: She washed out the stain. He applied the conditioner, waited 30 seconds, and then washed it out.
3. To be removed by washing: The grease washed out without a problem.
4. To cause something to fade by laundering: Bleach might wash out the color. Repeated launderings washed my jeans out.
5. To cause something to fade or appear faded: The moonlight washed out the stars. That suit really washed him out.
6. To carry or wear something away by the action of moving water: The river rose and washed out the dam. A large wave washed our picnic basket out to sea.
7. To be carried or worn away by the action of moving water: The bridge has washed out, so we'll need to take another route.
8. To deplete someone of vitality: The long rehearsal washed out the cast. The long day in the sun washed us out. By evening, I was washed out from overwork.
9. To eliminate as unsatisfactory: The captain washed out everyone responsible for the mistake. Several employees weren't any good, and the manager washed them out.
10. To be eliminated as unsatisfactory: The officer candidate washed out after one month.
11. To force the cancellation or postponement of some event because of rain: The storm washed out the parade. Team practice was washed out yesterday.