Meaning

noun a line determining the limits of an area

noun the line or plane indicating the limit or extent of something

noun the greatest possible degree of something

originFrom Middle English *bounden (attested as bounten), from French bondir (“leap", "bound", originally "make a loud resounding noise”); perhaps from Late Latin bombitāre (“hum, buzz”), frequentative verb, from Latin bombus (“a humming or buzzing”).

Etymology from Wiktionary, CC BY-SA 3.0