What does 1D mean?

One Direction (band)

Other definitions of 1D:

All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of 1D that should be included here, please let us know. Keep scrolling and fill out the form below!

How to use the term 1D:

There are no example uses of 1D at this time. We would greatly appreciate your contribution if you would like to submit your own!