n.
1.a connecting shape
2.a relation between things or events (as in the case of one causing the other or sharing features with it)
3.the process of bringing ideas or events together in memory or imagination
4.an instrumentality that connects
5.shifting from one form of transportation to another
6.the act of bringing two things into contact (especially for communication)
Idiom of the Day
set (someone) back on his or her heels
to surprise/shock/overwhelm someone
The announcement by the principal set the teachers back on their heels.