Do centre blocks qualify?

I have heard "semi-hollow" applied to ES335 type guitars.
I have friends with very similar guitars, but one is an ES125 and the other is an ES125T. Al's ES125 is a full body guitar while Aaron's ES125T is about the thickness of a 335, but fully hollow. I would say these both qualify as "hollow bodies".
I have owned an ES175 and an Epi Emperor, and while both were hollow bodied and I could practice without an amp, I would not perform without plugging them in. My brother's old Hofner arch top and the Gretsch Synchromatic that I once owned were effective acoustic guitars.

@sleigh, 4 figures is a brand new level man! Be careful you don't give up too much gigging time.

Just been playing a Godin 5th Avenue, arch top fully acoustic, it was fitted with electric strings, from brand new, that's never right is it ?

ES335 is a semi hollow body "thinline" A Casino is a hollow body "thinline". Then there are the Others which are deeper bodies the T stood for thinline.

All are made of a multi layered ply top and back and ply sides Pressed in a heated mold to create the arch top affect also added strength to the top and back . They were mainly for people who wanted and like a larger body electric. Sure the hollow nature affect tone to a point as did the type of pick ups yet still electric guitars. My opinion the Casino with P90's was the best sounding yet did get feed back because it was fully hollow. I owned a 67 wish I never sold it Owned a 67 Gretsch country gent Chet Atkins  all had painted on F holes remove the padded cover on the back and then a plastic plate only way to get at the controls for repair others used the f holes. ES335 with the center block had pickups mounted through the top. Casino mounted on the top. Gretsch on the top.

Now the true acoustic arch tops with the F holes are made with solid wood bodies with usually two long bar top bracing , they were designed to play as a true acoustic and always with a pick. They had added pick ups suspended above the body either off the end of the neck or pick guard never to the top to be played through an amp for larger areas. You had the option yet not in the beginning.