Moment; prison sentence (4)
I believe the answer is:
time
I believe this is a double definition.
'moment' is the first definition.
(time is a kind of moment)
'prison sentence' is the second definition.
(as in 'doing time')
(Other definitions for time that I've seen before include "Prison sentence; occasion" , "Procrastination is the thief of ." , "The father of Truth, presumably" , "Indefinite period" , "See 12" .)