conditional

Short definition from Wiktionary

Adjective

1. 1
   Limited by a condition.
2. 2
   Stating that one sentence is true if another is true.
3. 3
   Expressing a condition or supposition.

Noun

1. 1
   A conditional sentence; a statement that depends on a condition being true or false.
2. 2
   The conditional mood.
3. 3
   A statement that one sentence is true if another is.
4. 4
   An instruction that branches depending on the truth of a condition at that point.
5. 5
   A condition (a limitation or restriction).