Boxerbriefs vs. Trunks - what's the difference?

One of the most common inconsistancies that I've seen in the men's underwear world is the use of the terms 'trunk' and 'boxerbrief'. Brands often use these terms interchangeably, however they refer to entirely different things. They are similar, but still very different. I may have this wrong, but as I see it the terms are defined as follows. If you disagree with these definitions please call me on it because these are the definitions that I go by when writing posts.

Boxerbriefs:
-usually has a fully functioning front fly
-has two back seams "framing" the ass.
-generally legs are a longer than trunks (hits mid-thighish)
-Elastic waistband and legbands




Trunks:
-usually has no fly
-usually no seam in back or one seam down the middle
-often they are "seamless"
-legs tend to be shorter than trunks (hitting just low enough to cover)
-often has elastic waistband
-usually does not have elastic legbands

Hope that clarifies the difference. It is very confusing. So let's not even talk about hipsters, or low-rise trunks, or any other similar terms that are also tossed around.

And don't even get me started on the punctuation of boxerbrief (boxerbrief, boxer brief, boxer-brief). I just tend to switch it up the punctuation because the idea is always clear.

Look at the photos for further clarification.

Poll of the day: What are your thoughts on this? Do you go by a different definition? What is that? Is my definition incorrect?