It has a few different deffinitions for yarn foward. Basically, I think on here it's called yarn over (YO) and there is a video on how to do it in the glossary too.
If you'd prefer a Mod, or more experianced knitter, to come along and comfirm I completely understand. :D
Since you're doing a k2tog, then it would be a YO. Just bring the yarn forward as if you were going to purl, and then knit the next stitch. This will create your YO stitch.
So,OxxxAmandaxxxO, you were right!
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