n.
1.an event in which one thing is substituted for another
2.the act of furnishing an equivalent person or thing in the place of another
3.someone who takes the place of another person
4.a person or thing that takes or can take the place of another
5.filling again by supplying what has been used up
6.a person who follows next in order
Idiom of the Day
get an earful
to hear much talk or criticism or complaints about something
Our boss got an earful when he asked the employees if they had any complaints.