What is R?

R definition and meaning on Dictionary terms:
noun, plural R’s or Rs, r’s or rs.
the 18th letter of the English alphabet, a consonant.
any spoken sound represented by the letter R or r, as in ran, carrot, or rhyme.
something having the shape of R.
a written or printed representation of the letter R or r.
a device, as a printer’s type, for reproducing the letter R or r.
three R’s.


reference: www.dictionary.com/browse/r