scrub

1. One who labors hard and lives meanly; a mean fellow.
2. One who is incompetent or unable to complete easy tasks.

   What a scrub! Instead of washing the dishes she put the used food on her face!

3. A thicket or jungle, often specified by the name of the prevailing plant

   oak scrub

4. (stock breeding) One of the common livestock of a region of no particular breed or not of pure breed, especially when inferior in size, etc. Often used to refer to male animals unsuited for breeding.
5. Vegetation of inferior quality, though sometimes thick and impenetrable, growing in poor soil or in sand; also, brush.
6. One not on the first team of players; a substitute.

adjective

Mean; dirty; contemptible; scrubby.

1. An instance of scrubbing.
2. A cancellation.
3. A worn-out brush.
4. One who scrubs.
5. (in the plural) Clothing worn while performing surgery.
6. (by extension, in the plural) Any medical uniform consisting of a short-sleeved shirt and pants (trousers).
7. An exfoliant for the body.

1. To rub hard; to wash with rubbing; usually, to rub with a wet brush, or with something coarse or rough, for the purpose of cleaning or brightening

   to scrub a floor

2. To rub anything hard, especially with a wet brush; to scour
3. To be diligent and penurious

   to scrub hard for a living

4. To call off a scheduled event; to cancel.

   Engineers had to scrub the satellite launch due to bad weather.

5. To eliminate or to correct data from a set of records to bring it inline with other similar datasets

   The street segment data from the National Post Office will need to be scrubbed before it can be integrated into our system.

6. (audio) To move a recording tape back and forth with a scrubbing motion to produce a scratching sound, or to do so by a similar use of a control on an editing system.
7. (audio, video) To maneuver the play position on a media editing system by using a scroll bar or touch-based interface.