Meaning of brittle

(adj) having little elasticity; hence easily cracked or fractured or snapped; "brittle bones"; "glass is brittle"; "`brickle' and `brickly' are dialectal"

lacking warmth and generosity of spirit; "a brittle and calculating woman"

(of metal or glass) not annealed and consequently easily cracked or fractured

(noun) caramelized sugar cooled in thin sheets