The English Wiktionary lists "canopy" as a possible meaning, and an example for a canopy is the upper part of a parachute. That's what I'll use to represent this character in other characters. The character 广 also kinda looks like a parachute with the canopy at the top and one of the strings at the side.
In the anglepod (ang3), Gitta Giraffe (gu) just invented the art of building a wide (广) parachute (广) out of berets (亠) and bananas (丿), using the berets as canopy (广) and banana peel as strings. Soon, this new sport spreads (广) all over the world as the new thing to do.