digit

1. (mathematics) A position in a sequence of numerals representing a place value in a positional number system.Examples: "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."Synonyms: place, figure

2. (mathematics) A distinct symbol representing a natural number in a positional number system.Examples: "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. (units of measure, astronomy) ¹⁄₁₂ the apparent diameter of the sun or moon, (chiefly) as a measure of the totality of an eclipse.Examples: "A six-digit eclipse covers half the lunar surface."Synonyms: finger

4. (historical units of measure) 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.Synonyms: finger, fingerbreadth, fingersbreadthhistorical

5. (units of measure, obsolete) Synonym of inch.Synonyms: inchobsolete

6. (anatomy) A narrow extremity of the human hand or foot: a finger, thumb, or toe.Examples: "Jai grabbed Andrew’s shoulders with the same three digits he had used to grab the ancient doubter’s skull and spun him around."