Definition of dead matter:
(n) :
a person you share a
seat with (such as a bench or other surface that seat more than one); a person you sit next to
"my seatmate on the airplane snored incessantly."
Definition of dead matter:
(n) :
a person you share a
seat with (such as a bench or other surface that seat more than one); a person you sit next to
"my seatmate on the airplane snored incessantly."