Describe Time.

Maybe ask this guy:

 

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Yeah. Like spatial dimensions are dimensions in which the distance between physical points is measured, dimension of time is a dimension in which the distance between events is measured.

 

Time is imaginary

 

The Texans apparently don't have much of it.

http://www.chron.com/disp/story.mpl/sports/7314115.html

 

its the reason your balls drop.

 

Assuming whoever you're explaining this to was familiar with space, you could say that time is like another dimension of space, but with an arrow that defines the one direction in which you can (and must) travel.

 

The only reason it exists at all is because we all die at some point.

 

It's mankind's fallback explanation for something they don't fully understand.