back and forth /ˈbæ.kənˌfɔːθ/adverb 2noun 2adjective 1verb 1forms 4 adverb2 •From one place to another and back again. •Flip-flopping between multiple options, courses of action, etc. noun2 •The movement (of someone or something) forward followed by a return to the same position. May refer to a concept such as an emotional state or a relationship as well as a physical thing.Roll the ball to your child, who then rolls it back to you. After a few back-and-forths, roll the ball to a nearby corner of the room or other hiding place. — 2009 •Negotiations or discussions (not necessarily fruitful) between two or more parties; a dialog.There's some back and forth between Simpson and his CIA counterparts and, in essence, the CIA says that you must ship all of the quantities requested. — 1895 adjective1 •Going from one place or position to another and back again.The back and forth movement of the tide causes erosion of the coastline. verb1 •To go repeatedly in one direction, then the opposite, or to switch one's mind between two options repeatedly. formsback and forthed · back and forthing · back and forths · back-and-forths