stipulation

Short definition from Wiktionary

Noun

1. 1
   The act of stipulating; a contracting or bargaining; an agreement.
2. 2
   Something that is stated or stipulated as a condition of an agreement.
3. 3
   The situation, arrangement, and structure of the stipules.
4. 4
   A goal to be achieved in a chess problem; for example, to checkmate Black within a specified number of moves.