Wait one second, please.

A unit of time equal to one sixtieth of a minute.
It only took a second to tie my shoe.
The race ended in a second.
He arrived in a second.
every second
for a second
in a second
moment
instant
jiffy
He finished second in the race.

The ordinal number that follows the first in a sequence.
This is the second time I've visited this museum.
This is my second cup of coffee.
She is the second oldest child.
second place
second chance
second thought
next
following
subsequent