purposive

Short definition from Wiktionary

Adjective

1. 1
   Serving a particular purpose; adapted to a given purpose, especially through natural evolution.
2. 2
   Done or performed with a conscious purpose or intent.
3. 3
   Pertaining to purpose, as reflected in behaviour or mental activity.
4. 4
   Pertaining to or demonstrating purpose.
5. 5
   Possessed of a firm purpose.
6. 6
   Of a clause or conjunction: expressing purpose.

Noun

1. 1
   A mood indicating a purpose of the course of activity expressed by the verb.