mark·er 
/ˈmɑɚkɚ/ noun
plural mark·ers /ˈmɑɚkɚ/ noun [count] 1 : something (such as a sign or an object) that shows the location of something
▪ a grave marker 2 : something that shows the presence or existence of something
▪ a marker for/of cancer ▪ A person's accent can be a marker of social class. 3 : a type of pen that makes wide lines — see picture at office; see also magic marker
▪ a grave marker
▪ a marker for/of cancer ▪ A person's accent can be a marker of social class.
