digit

noun

1. 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.”

   “This meter is a 3½ digit digital multimeter that is rugged, reliable and convenient to use, while providing all of the accuracy and features needed for any application.”

2. 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.”

3. ¹⁄₁₂ the apparent diameter of the sun or moon, (chiefly) as a measure of the totality of an eclipse.

   “A six-digit eclipse covers half the lunar surface.”

4. (historical)A unit of length notionally based upon the width of an adult human finger, standardized differently in various places and times, (especially) the English digit of ¹⁄₁₆ foot, now equivalent to about 1.9 cm.
5. (obsolete)Synonym of inch.
6. A narrow extremity of the human hand or foot: a finger, thumb, or toe.

   “Jai grabbed Andrew’s shoulders with the same three digits he had used to grab the ancient doubter’s skull and spun him around.”

7. Similar or similar-looking structures in other animals.

   “The ruminants have the cloven foot, i.e. two hoofed digits on each foot.”

8. (obsolete, rare)Synonym of degree: ¹⁄₃₆₀ of a circle.
9. Synonym of manicule.

verb

1. (archaic, transitive)To point at or point out with the finger.