Noun. Television host or personality. “In dialect, [“rip”] is a combining form for expressions like rip-stave, rip-snort and the airheaded television presenter’s rip-‘n’-read.” (William Safire, New York Times, October 31, 1999)/“Two-times Super Bowl winner [Deion] Sanders, now a popular television presenter, played as a kick and punt returner, cornerback and later a wide receiver.” (Los Angeles Times, February 6, 2011) Google Ngram.
notoneoffbritishisms.com 
In American usage “presenter” tends to mean “person giving a presentation,” not just “television host.” Is there a one-word British equivalent?
Yes, it’s “presenter”. The words are interchangeable. A TV presenter presents a TV show and a presenter presents a…. presentation. To distinguish which kind of presenter it is the phrase “TV” or “television” is added as a prefix, i.e. “TV presenter”, “television presenter” to distinguish it/he/she from any other kind of presentation/presenter.
I’m surprised hardly anyone chose “over-the-top” I have never heard a host being referred to as a “presenter”. Though I’ve heard the phrase “presented by” being used to describe a high profile host.
The thing that always confuses me is the British term “series” for “season”.. because a “series” is the entirety of a serial show/program/programme in Canada. ex – Seinfeld is a series with 11 seasons. I suppose a Brit might say “Seinfeld is a program with 11 series” ?
One more thing… why are British TV seasons so SHORT!? I love British comedy, but so many of your series have SIX eps/season… In N America, it’s almost always 22, 26, or at least 13 eps/season.
Brits use series for both meanings. I’d say Seinfeld is a TV series. I’d also say that its second series (ie, season) was the best. It only gets confusing if you try to combine the two meanings, so we would not say Seinfeld is a TV series with 11 series.
Perhaps the reason for the short seasons is that US comedy shows are generally written by teams of multiple hired-in writers, and there seems to be an almost industrial process for churning out episodes to a consistent standard (which can be very high, as with, say, Friends, Seinfeld or Big Bang Theory). UK shows are usually entirely written by the one or two people who created the show, eg, Gervais/Merchant, Cleese/Booth, Galton/Simpson, Croft/Perry, Saunders, so they have more limited capacity to produce material.