the.com/dialog

means A box or exchange where two parties — often you and your computer — trade words back and forth, usually so one of them can get something settled.

from From Greek 'dialogos' — 'dia' (across, between) plus 'logos' (speech, word) — meaning a conversation between two or more voices. Despite the look of it, the 'dia' doesn't mean 'two' (that's a common mix-up); it means 'through' or 'across,' so a dialog can technically involve any number of speakers. The word passed through Latin and French into English for literary and dramatic conversation long before software borrowed it for those little boxes that pop up pretending to converse with you, but really just want a click.