^ âeucatastropheâ (US) / âeucatastropheâ (UK) in Oxford Dictionaries, Oxford University Press.
I agree compeltely with Glauber Rocha; @Shirley, although you asked about storing in the refrigerator, it is worth noting also that caramelized onions store very well in the freezer, up to six months. â Bruce Goldstein Dec 12 '11 at 16:01.
Cut onions will be OK for a couple days in the fridge. If you are going to use it in cooking, chop the remainder of the onion when you first cut it up. Put it into a containerâ¦ and freeze. Then, you can take out what you need as you need it.   Another answer If kept in an airtight container 7 days.