Definition of "stateful" [state•ful]

• That supports different states, reacting to the same input differently depending on the current state. (adjective)
• Full of state; stately. (adjective)

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• "CheckPoint is a pioneer in stateful inspection firewalls and, like Avaya and unified communications, is focused solely on the security business with products dedicated to firewalling, VPNs, unified threat management and intrusion prevention."
• ""We have a technology that we refer to as stateful assessment technology," Ewe said."
• "Cyberoam UTM delivers the complete range of security features such as stateful inspection firewall, VPN, gateway anti-virus, gateway anti-malware, gateway anti-spam, intrusion prevention system, content filtering in addition to bandwidth management and multiple link management over a single platform."