Ordinary, commonplace (8)
I believe the answer is:
everyday
I believe this is a double definition.
'ordinary' is the first definition.
(similar in meaning)
'commonplace' is the second definition.
(I've seen this before)
(Other definitions for everyday that I've seen before include "Commonplace and ordinary" , "Ordinary, for regular use" , "Quotidian" , "Run-of-the-mill" , "familiar" .)