What is the meaning of "Spice up"?

Iman   Thursday, December 02, 2004, 17:55 GMT
Why the meaning of "Spice up" is not in any dictionary? what is the meaning of this phrasal verb? thanks.
Jacob   Thursday, December 02, 2004, 18:19 GMT
To "spice something up" is to make it more interesting or exciting.

Math can be boring, so I like to spice up my lectures by throwing in a few jokes.

This web page seems too simple -- let's spice it up with a little Javascript.
Iman   Friday, December 03, 2004, 15:56 GMT
Thank you so much Jacob.