Sentence:  A <WSD>"graph</WSD>" <!--- bold and italic in the source ---> is a token-level nondistinctive representation of a grapheme. It can differ from the other variants of its grapheme with regard to upper case, lower case, script, print, typeface style, typeface size, etc. 
Meaning of the word marked with <WSD> tags:  A graphical unit on the (token-level), the abstracted fundamental shape of a character or letter as distinct from its ductus (realization in a particular typeface or handwriting on the (instance-level)) and as distinct by a (grapheme) on the (type-level) by not fundamentally distinguishing (meaning).