1. 
[syn: accumulative, cumulative]
2.  marked by acquiring or amassing; 
- Example: "we live in an accumulative society"
The Collaborative International Dictionary of English v.0.48:
Accumulative \Ac*cu"mu*la*tive\, a.
   Characterized by accumulation; serving to collect or amass;
   cumulative; additional. -- Ac*cu"mu*la*tive*ly, adv. --
   Ac*cu"mu*la*tive*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
accumulative
    adj 1: increasing by successive addition; "the benefits are
           cumulative"; "the eventual accumulative effect of these
           substances" [syn: accumulative, cumulative]
    2: marked by acquiring or amassing; "we live in an accumulative
       society"