Intrusion Prevention System: Software that has all the capabilities of an intrusion detection system and can also attempt to stop possible incidents.
Sources:
CNSSI 4009-2015
from
NIST SP 800-94
A system that can detect an intrusive activity and also attempt to stop the activity, ideally before it reaches its targets.
Sources:
NIST SP 800-82r3
under intrusion prevention system
System which can detect an intrusive activity and can also attempt to stop the activity, ideally before it reaches its targets.
Sources:
NISTIR 7711
under Intrusion Prevention System