What is the meaning of Earmark?

To mark (sheep or other animals) by slitting the ear.

To specify or set aside for a particular purpose, to allocate.

To designate part of a pension to be payable to the holder's former spouse or partner at its time of payment.

A mark or deformation of the ear of an animal, intended to indicate ownership.

The designation of specific projects in appropriations of funding for general programs.

A mark for identification; a distinguishing mark.

Source: wiktionary.org