noun.
A unit of length equal to one hundredth (10−2) of a meter.
The Century Dictionary and Cyclopedia
noun.
In the metric system, a measure of length, the hundredth part of a meter, equal to 0.3937+ of an English inch: that is, one inch equals 2.54 centimeters, as nearly as possible. Also spelled centimetre, and abbreviated cm.
the GNU version of the Collaborative International Dictionary of English
noun.
The hundredth part of a meter; a measure of length equal to rather more than thirty-nine hundredths (0.3937) of an inch. See meter.