Definition of "Characteristic" :
noun: a distinguishing quality
noun: any measurable property of a device measured under closely specified conditions
noun: a prominent attribute or aspect of something
"Generosity is one of his best characteristics."
noun: the integer part (positive or negative) of the representation of a logarithm; in the expression log 643 = 2.808 the characteristic is 2
adjective: typical or distinctive
"Heard my friend's characteristic laugh."