A thing used in quantum mechanics to describe fields of probability.

Let's say you've got a (slightly)ditzy boy/girlfriend, and you're at the mall. You stop at a Subway to get a sandwich or something, and when you turn around, your boy/girlfriend is gone. Now, you have two options at this point:

  1. Run around knocking people over, screaming his/her name, until you get desperate and call Security,
  2. OR:
  3. Reflect on your SO's basic nature. Realize that he/she likes shoes/jewelry. Construct a wave packet and superimpose it on a map of the mall, making sure high-probability areas are centered on Foot Locker and Zales.
  4. Congratulations! You've just used a wave packet to find your boy/girlfriend! Now, leave him/her there, and look at Everything Personals.