What is the term for "large battles" that weren't sieges in medieval warfare?

by [deleted]

I know there is a term for it and I can't remember what it is. I was just reading more about siege warfare and militaries of the medieval times and it got me thinking about this term that I can't think of.

Kawagatam

I've heard the terms "field" and "pitched" to describe large non-siege battles, was it one of those?