Real Dictionary

-graph in American English
something that writes or records
combining form: a combining form meaning “drawn,” “written” ( lithograph; monograph). It is specialized in meaning to indicate the instrument rather than the written product of the instrument ( telegraph; phonograph)

-graph in British English
combining form in countable noun: an instrument that writes or records

graph
countable noun: A graph is a mathematical diagram which shows the relationship between two or more sets of numbers or measurements.

graph in American English
noun: a diagram representing a system of connections or interrelations among two or more things by a number of distinctive dots, lines, bars, etc
transitive verb: to draw (a curve) as representing a given function

graph in American English 1
a diagram, as a curve, broken line, or series of bars, representing various kinds of quantitative information and relationships, such as the successive changes in a variable quantity or quantities
to put in the form of, or represent by, a graph

graph in American English 2
a writing-system unit which may be a representation of a phoneme, a syllable, etc.

graph in British English
noun: a drawing depicting the relation between certain sets of numbers or quantities by means of a series of dots, lines, etc, plotted with reference to a set of axes
verb: to draw or represent in a graph

graph- in American English
combining form