Simplified definitions from Webster's New Collegiate Dictionary

alibi: 
   The fact of having been, at the alleged time of commission, elsewhere than
at the place of commission.

place: 
   A particular spot.

spot: 
   Any particular place.

time: 
   The period during which an actions continues.

continue: 
   To endure; last.

endure: 
   To continue in the same state; to last.

last:
   To continue in time, to endure.