Definitions

1. adjective

of or relating to a region that is intermediate in elevation and climate between a lower, warmer zone and a higher, colder zone

“The semialpine vegetation near the mountain pass was a unique blend of alpine and subalpine species.”

2. noun

a region or area with a climate intermediate in elevation between a lower, warmer zone and a higher, colder zone

“The botanist studied the unique flora of the semialpine zone in the mountain range.”