adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A tyre whose compound is harder than a normal hard tyre.

Adjective

1. 1
   Having a very high hardness.
2. 2
   Highly strengthened against attack.

   "a superhard missile silo"

3. 3
   Having a hardness between that of boron nitride and that of diamond. not-comparable

Etymology

From super- + hard.

Related phrases

boron nitride

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.