holdback

Short definition from Wiktionary

Noun

1. 1
   restraint; a device or part of a device that operates to restrain.
2. 2
   restraint; a device or part of a device that operates to restrain: The projection or loop, on the thill of a vehicle, to which a strap of the harness is attached, to hold back a carriage when going downhill, or in backing. Also, the strap or part of the harness so used.
3. 3
   A delay in the movement of solute due to the slowing effects of diffusion
4. 4
   Income that is set aside for eventualities such as customer returns, seasonal fluctuations, performance bonuses, unexpected costs, etc.
5. 5
   A portion of the money that is owed to someone which is not paid, but instead held as security, until the entire job or contract has been successfully completed.
6. 6
   Money that a buyer does not pay at the time of purchase, but which is paid afterward (sometimes in installments, sometimes on a specified date).
7. 7
   The difference between a dealer's cost and the manufacturer's suggested retail price.
8. 8
   A time period during which sales of a specific security or commodity cannot occur.
9. 9
   A time period after the first release of a creative work before it can be distributed or adapted to other channels.
10. 10
    A legal provision for restricting distributions to a trust beneficiary under certain conditions.
11. 11
    The withholding of permits to extract a natural resource.
12. 12
    A designation of some details about a crime that the police deliberately do not reveal to the public.
13. 13
    A random subset of a body of data that is not used in the main analysis, but rather reserved for other purposes, such as validation.

Verb

1. 1
   To set up a holdback.