Is refreezing a meal safe?
Freezing ... well, basically freezes the growth of bacteria inside your food. Thus, if you heat it up quick enough later, it will not have significantly more bacteria or mold (spores) and related poisons than in the moment it got to the save temperature (remember that this moment is not exacly at the point you put it in the freezer but later.)
If you would eat it tomorrow though than you can as well freeze it today, as long as you make sure you don't keep it for days after defrosting again.