2) In physics Planck time is the unit of time in the system of natural units known as Planck units. It is the time it would take a photon travelling at the speed of light in a vacuum to cross a distance equal to the Planck length.
A phrase made up by Dubya, used to refer to Iraq. From context, it apparently has a positive connotation, but is distinct in meaning from "secure". Most likely means something to the effect of "peaceful and free".
To make plans with the intention of canceling or never following through. Often used if the planceling party is not quick enough to come up with an excuse. Sometimes both parties plancel, and no meeting is intended, the future event is just a social gesture.
A: What are you doing on Thursday?
B: (Thinking: I can't come up with anything!) I don't know.
A: Let's go see a movie
B: That would be great. (I'm trapped. I hope he doesn't call, but I'll tell him a family member is ailing if he presses it.)
The two-way, generic plancel:
A: It was so good to see you.
B: You too. Let's do dinner sometime. (We're never doing dinner).
A: Definitely. (We're never doing dinner.)