common /ˈkɒmən/ adjective
USUAL › happening often or existing in large numbers: Injuries are common in sports such as hockey. → Opposite uncommon
SHARED › belonging to or shared by two or more people or things: a common goal/interest English has some features common to many languages.
common knowledge › something that a lot of people know: [+ that] It's common knowledge that he spent time in jail. ORDINARY [always before noun] › not special in any way: The herbs all have common names and Latin names.
LOW CLASS UK › typical of a low social class: My mum thinks dyed blonde hair is really common.