n (mathematics) A position in a sequence of numerals representing a place value in a positional number system.
n (mathematics) A distinct symbol representing a natural number in a positional number system.
n (units of measure, astronomy) ¹⁄₁₂ the apparent diameter of the sun or moon, (chiefly) as a measure of the totality of an eclipse.
n (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.
n (units of measure, obsolete) Synonym of inch.
n (anatomy) A narrow extremity of the human hand or foot: a finger, thumb, or toe.
n (zoology) Similar or similar-looking structures in other animals.
n (geometry, rare, obsolete) Synonym of degree: ¹⁄₃₆₀ of a circle.
v (transitive) To point at or point out with the finger.