Definition of r
(Entry 1 of 4)
1a
: the 18th letter of the English alphabet
b
: a graphic representation of this letter
c
: a speech counterpart of orthographic r
2
: a graphic device for reproducing the letter r
3
: one designated r especially as the 18th in order or class
4
: something shaped like the letter R
r
abbreviation (1)Definition of r (Entry 2 of 4)
1
radius
2
rain
3
range
4
rare
5
real
6
recto
7
red
8
repeat
9
rerun
10
resistance
11
right
12
roentgen
13
rook
14
rough
15
run
R
abbreviation (2)Definition of R (Entry 3 of 4)
1
rabbi
2
radial
3
radical
—used especially of a monovalent hydrocarbon radical
4
Rankine
5
Reaumur
6
recipe
7
registered trademark
—often enclosed in a circle
8
regular
9
Republican
10
river
11
R-value
Definition of R (Entry 4 of 4)
Keep scrolling for more
Keep scrolling for more