The word Earmarks has been in the news latley and until I looked it up I had no idea what it meant.  
I figured I wasnt the only one so why not post the definition.
The definition comes from http://earmarks.omb.gov/.

What is an Earmark?

Earmarks are funds provided by the Congress for projects or programs where the congressional direction (in bill or report language) circumvents the merit-based or competitive allocation process, or specifies the location or recipient, or otherwise curtails the ability of the Executive Branch to properly manage funds. Congress includes earmarks in appropriation bills - the annual spending bills that Congress enacts to allocate discretionary spending - and also in authorization bills.

OMB Guidance to Agencies on Definition of Earmarks
http://earmarks.omb.gov/earmarks_definition.html

OMB defines earmarks as funds provided by the Congress

for projects or programs where the congressional direction (in bill or report language) circumvents Executive Branch merit-based or competitive allocation processes, or specifies the location or recipient, or otherwise curtails the ability of the Executive Branch to manage critical aspects of the funds allocation process.

• Earmarks vs. Unrequested Funding. At the broadest level, unrequested funding is any additional funding provided by the Congress -- in either bill or report language -- for activities/projects/programs not requested by the Administration. Earmarks are a subset of unrequested funding. The distinction between earmarks and unrequested funding is programmatic control or lack thereof of in the allocation process.
• Earmarks and Programmatic "Control." If the congressional direction accompanying a project/program/funding in an appropriations bill or report or other communication purports to affect the ability of the Administration to control critical aspects of the awards process for the project/program/funding, this IS an earmark. Note: The definition of "control critical aspects" includes specification of the location or recipient or otherwise circumventing the merit-based or competitive allocation process and may be program specific. However, if the Congress adds funding and the Administration retains control over the awards process for the project/program/funding, it is NOT an earmark; it is unrequested funding.
• Earmarks Include:
  1. Add-ons. If the Administration asks for $100 million for formula grants, for example, and Congress provides $110 million and places restrictions (such as site-specific locations) on the additional $10 million, the additional $10 million is counted as an earmark.
  2. Carve-outs. If the Administration asks for $100 million and Congress provides $100 million but places restrictions on some portion of the funding, the restricted portion is counted as an earmark.
  3. Funding provisions that do not name a recipient, but are so specific that only one recipient can qualify for funding.

OMB has used this definition to gather data on earmarks internally. This definition is similar to the definition that the Congress recently developed for disclosing earmarks in spending legislation (H. Res. 6 and the Senate-passed version of S. 1).

Other documents on collection of information about earmarks:

• State of the Union excerpt on earmarks (1-23-2007)
• OMB Memorandum M-07-09--Collection of information on Earmarks