A greeting (salutation) said when encountering someone that one has met with recently in the past.

(idiomatic, management) A payment offered to an employee as an inducement to join, especially if currently working for a competitor.

plural of hello girl

plural of golden hello

plural of Hello World

(telephony, informal, dated) A female telephone operator.

(programming, by extension) A simple first program for any purpose.

(programming) A simple script or program designed to output the text "Hello World" as a demonstration of the computer language or environment.

Used to describe a situation involving the display of an object that is menacing or unpleasantly excessive, especially a large firearm.

(humorous) A response to being greeted with "hello".