1. the fact of being hard but easily broken
   • ● the hardness and brittleness of coal
2. the fact of appearing to be strong but actually being easily damaged
   • ● the growing brittleness of the country's economy
3. the fact of appearing to be happy or confident but actually being nervous and easily upset
   • ● There was some brittleness in his tone.

[TahlilGaran] English Dictionary ▲