cumulative

Short definition from Wiktionary

Adjective

1. 1
   Incorporating all current and previous data up to the present or at the time of measuring or collating.
2. 2
   That is formed by an accumulation of successive additions.
3. 3
   That is formed by an accumulation of successive additions: Adding one statement to another.
4. 4
   That tends to accumulate.
5. 5
   Having priority rights to receive a dividend that accrue until paid.
6. 6
   (of evidence, witnesses, etc.) Intended to illustrate an argument that has already been demonstrated excessively.