I. to and fro 1 /ˌtuː ən ˈfrəʊ $ -ˈfroʊ/ BrE AmE adverb
if someone or something moves to and fro, they move in one direction and then back again SYN backwards and forwards
—to-and-fro adjective
II. to and fro 2 BrE AmE noun [uncountable]
informal continuous movement of people or things from place to place
⇨ ↑ toing and froing (1)