Toward or Towards?

I was doing some copy-editing at my internship this morning (side-note: I love that I get to copy-edit at my internship) when I came across the word towards. This is not a word I had previously contemplated, however, I always instinctively use toward without the s. As is my practice when I come across something I don't readily know, I decided to look it up.

Upon investigation, it turns out there isn't a difference. That's right, feel free to use toward and towards interchangeably. The only slight distinction is that towards is most commonly associated with British English, while toward is most often used in American English. Nevertheless, both are correct.

Check out Merriam-Webster's definition here.