A language that uses hands, facial expressions, and other bodily behavior to communicate both concrete and abstract ideas; some signs are based on English words, but ASL syntax and grammar are not based on English. ISO 639-3 code: ase.

The hash or number sign (#).

(computing) The character # used to represent the word number; the hash sign; also called the pound sign in the US

Alternative form of equal sign

(archaic, idiomatic) A standing pole and two wash-balls, historically used outside barber's shops.

To create a sign out of something. / To give (something) a meaning or an importance. / To show one’s intentions with a sign etc.; to indicate, announce. / To mean; to betoken.

A sign of victory or peace made by raising the index and middle fingers with the palm outwards.

(mathematics) the symbol ±, meaning "plus or minus", used to indicate the precision of an approximation (as in "The result is 10 ± 0.3", meaning the result is anywhere in the inclusive range from 9.7 to 10.3), or as a convenient shorthand for a quantity with two possible values of opposing sign and identical magnitude (as in "The roots of the equation x² - 4 = 0 are ±2").

(mathematics) the symbol ∓, meaning "minus or plus", used alongside the plus-minus sign to show that a negative value is to be taken where the positive value is indicated by the plus-minus sign, and vice versa (as in (x ± 1) / (x ∓ 2), which means (x + 1) / (x - 2) and (x - 1) / (x + 2)).

A straight line along which an observer has a clear view. / (weaponry) The line which passes through the front and rear sight, at any elevation, when they are sighted at an object.