two-way

English

From two +‎ way. Compare Old English twiweġ (“intersection, junction of two roads”).

two-way (not comparable)

(of a highway) Allowing traffic in two directions.
(of traffic, visibility) Moving or occurring in opposite directions.
(of a radio, etc.) Permitting communication in two directions, i.e. both transmitting and receiving.
- 1960 September, “Inter-city diesel units for the Hull-Liverpool service of the N.E.R.”, in Trains Illustrated, page 560:
  The inner power cars are brake second class compartment coaches; the guard has means of both bell and two-way telephone communication with the driving compartment.
(of a project, treaty, etc.) Involving the mutual action or participation of two parties.
(education) Utilising both Western and Indigenous knowledge systems; bothways.
- 2023 August 11, Sarah Legge, Libby Rumpff, Stephen T. Garnett, John C.Z. Woinarski, “Loss of terrestrial biodiversity in Australia: Magnitude, causation, and response”, in Science, volume 381, →DOI, page 8, column 3:
  There are increasing examples of Indigenous-led research, and "two-way" collaborative research between scientists and Indigenous land custodians.
(American football) Playing both offense and defense in the same game.
(statistics, of a table, etc.) Having or involving exactly two variables; bivariate.
A two-way chart; a two-way table.

moving in both directions

two-way (plural two-ways)