high implies marked extension upward and is applied chiefly to things which rise from a base or foundation or are placed at a conspicuous height above a lower level.
It's two and a half metres high and one metre wide. The corn grew waist-high (= as high as a person's waist) in the fields. high The garden is surrounded by a high wall. tall Mount Everest is the world's tallest mountain. lofty The path winds along the lofty peaks of the Andes.
