Definitions for "Evil twin"
a home-made wireless access point (hot spot) that masquerades as a legitimate one to gather personal or corporate information without the end-user's knowledge.
A Wi-Fi hotspot, operated by a hacker, which tries to fool users to believe that it is a legitimate hotspot by mimicking a network name (SSID) and a login page of a legitimate hotspot provider. The hacker purpose is to steal the users' login details or other personal information. This type of hotspot is also called rogue hotspot.
a bogus base station that latches on to someone using new "Wi-Fi" wireless technology