Meaning

noun a particular instance of buying or selling

noun an agreement between parties (usually arrived at after discussion) fixing obligations of each

noun (often followed by `of') a large number or amount or extent

originFrom Middle English del, dele, from Old English dǣl (“part, share, portion”), from Proto-West Germanic *daili, from Proto-Germanic *dailiz (“part, deal”), from Proto-Indo-European *dʰ(h₁)-oy-lo- (“part, watershed”). Cognate with Scots dele (“part, portion”), West Frisian diel (“part, share”), Dutch deel (“part, share, portion”), German Teil (“part, portion, section”), Danish, Slovene, and Swedish…

Etymology from Wiktionary, CC BY-SA 3.0