verb

Occur in turn repeatedly.

bouts of depression alternate with periods of elation

be interspersed,follow one another,be staggered,take turns,take it in turns,act in sequence,work in sequence,occur in turn,occur in rotation

adjective

Every other; every second.

she was asked to attend on alternate days

every other,every second

noun

A person who acts as a deputy or substitute.

he shall be entitled to exercise the vote of the director for whom he is an alternate