alternate (n) ˈɔl tərˌneɪt, ˈæl-; -nɪt
surrogate, alternate, replacement (adj)
someone who takes the place of another person
every second one of a series
"the cleaning lady comes on alternate Wednesdays"; "jam every other day"- the White Queen
alternate, alternative, substitute (adj)
serving or used in place of another
"an alternative plan"
alternate(a), alternating(a) (adj)
occurring by turns; first one and then the other
"alternating feelings of love and hate"
of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired
"stems with alternate leaves"
alternate, jump (verb)
go back and forth; swing back and forth between two states or conditions
exchange people temporarily to fulfill certain jobs and functions
understudy, alternate (verb)
be an understudy or alternate for a role
interchange, tack, switch, alternate, flip, flip-flop (verb)
reverse (a direction, attitude, or course of action)
alternate, take turns (verb)
do something in turns
"We take turns on the night shift"