Unscramble Iderefns

What is the meaning of word iderefns unscrambled?

What 8 letter words can be made from letters I D E R E F N S:

1. definers - Definition of definers

Make more words by adding or removing letters

How many 7 letter words can you make from letters I D E R E F N S?

1. defiers - Definition of defiers

2. definer - Definition of definer

3. defines - Definition of defines

4. deniers - Definition of deniers

5. fenders - Definition of fenders

6. finders - Definition of finders

7. friends - Definition of friends

8. nereids - Definition of nereids

9. redfins - Definition of redfins

10. refinds - Definition of refinds

11. refined - Definition of refined

12. refines - Definition of refines

13. resined - Definition of resined

14. serifed - Definition of serifed

Which 7 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling derefns
2) Removing the letter D and unscrambling ierefns
3) Removing the letter E and unscrambling idrefns
4) Removing the letter R and unscrambling ideefns
5) Removing the letter E and unscrambling iderfns
6) Removing the letter F and unscrambling iderens
7) Removing the letter N and unscrambling iderefs
8) Removing the letter S and unscrambling iderefn

More anagrams containing the letters I D E R E F N S
iderefsn iderenfs dreeinfs fsneride