Meaning of DUAL in English

DUAL

adj., n., & v.

--adj.

1. of two; twofold.

2 divided in two; double (dual ownership).

3 Gram. (in some languages) denoting two persons or things (additional to singular and plural).

--n. (also dual number) Gram. a dual form of a noun, verb, etc.

--v.tr. (dualled, dualling) Brit. convert (a road) into a dual carriageway.

Phrases and idioms:

dual carriageway Brit. a road with a dividing strip between the traffic in opposite directions. dual control (of a vehicle or an aircraft) having two sets of controls, one of which is used by the instructor. dual in-line package Computing see DIP. dual-purpose (of a vehicle) usable for passengers or goods.

Derivatives:

duality n. dualize v.tr. (also -ise). dually adv.

Etymology: L dualis f. duo two

Oxford English vocab.      Оксфордский английский словарь.