noun A position in a sequence of numerals representing a place value in a positional number system.
The base-10 number 123.4 has four digits: the hundreds digit is 1, the tens digit is 2, the units digit is 3, and the tenths digit is 4.
noun A distinct symbol representing a natural number in a positional number system.
Hexadecimal numeration (Base sixteen) includes the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 but also A (=10 decimal), B, C, D, E, and F. Sixteen itself is written as the two-digit number 10.
noun ⁄12 the apparent diameter of the sun or moon, as a measure of the totality of an eclipse.
A six-digit eclipse covers half the lunar surface.
noun A unit of length notionally based upon the width of an adult human finger, standardized differently in various places and times, the English digit of ⁄16 foot, now equivalent to about 1.9 cm.
noun Synonym of inch.
noun A narrow extremity of the human hand or foot: a finger, thumb, or toe.
noun Similar or similar-looking structures in other animals.