‖n. [ NL., from Gr. &unr_;; sy`n with + &unr_; a course, a running. ] 1. Concurrence. [ R. ] Glanvill. [ 1913 Webster ]
2. (Med.) A group of symptoms occurring together that are characteristic and indicative of some underlying cause, such as a disease. [ 1913 Webster ]
3. generally, a pattern of characteristics or behaviors occurring together, that are sufficiently common and distinctive to indicate that they are due to a known cause. [ PJC ]