Webster's English Dictionary

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graph

1. graph \'graf\ n [short for graphic formula] 1: a diagram that represents 
   the variation of a variable in comparison with  that of one or more other 
   variables 2: the collection of all points whose coordinates satisfy a given 
   functiona l relation
2. graph vt 1: to represent by a graph  2: to plot upon a graph 
3. graph n [prob. fr. -graph] 1: a spelling of a word  2: a single 
   occurrence of a letter of an alphabet in any of its various sha pes (as D, 
   d) 3: a letter or combination of letters taken as a minimum unit in 
   determinin g the phonemes of a language from written records