What is the correct spelling for 2NF?

If you have mistakenly typed "2nf" and are wondering what it should have been, there are a few possibilities. "2nd" might be the correct abbreviation for "second", while "2nd" can also be replaced with "second" in its entirety. Additionally, "2nf" could have been intended to be "2nd", denoting a numerical order.

Correct spellings for 2NF