i couldn't find the definition of the term "Telemark" in the dance dictionary
or in the glossary

I also want to know more about it....

The Telemark Family.
The Telemark - named after a Skiing Turn - is a standardized figure danced in the Waltz, Slow Foxtrot and the Quickstep. There are four Telemarks; The Closed Telemark; The Open Telemark; The Natural Telemark and the Hover Telemark. Various timings are used on the Telemarks according to the Time Signature and Tempo for that particular dance.

Ken. You didn't mention the Telespin, which is used in four of the Modern Dances. I heard Richard Gleaves say that it was probably done by mistake in the first place when the man got the lady in the wrong position and decided to finish it anyway. If anybody is wondering why a Double Reverse Spin is called Double. When Maxwell Stewart introduced it in 1924 they always did two complete. Most information of this type can be found in Victor Silvester's book Moden Ballroom Dancing. He was there. Ken . Did you ever hear any lectures by Frank Ford, he was also there. Vey interesting about the young man on the London stage who later went to Hollywood and won an academy award. He was a Grand Finalist in the first ever Star championship which Frank Ford won.

There is also the Double Open Telemark - a very attractive variation - and that's what the Telespin is a variation. I only listed the Telemarks that have been standardized in the text books. If you have read any of my analysis books I have given the origin of the name Double Reverse Spin (DRS). It is this: We accept that a basic reverse waltz turn is 3/4 of a turn to the left over the 6 steps and the original (DRS) is also a 3/4 turn to the left which commenced facing DC and ended facing DW The gentleman when dancing the (DRS) dances 2 steps and a toe pivot over 3 foot positions. So he dances DOUBLE the amount of turn over 3 steps to that of the reverse turn which is only 3/8ths.