1. (

• monstrous

) abnormally large ;

2. (

• atrocious ,
• flagitious ,
• grievous ,
• monstrous

) shockingly brutal or cruel; "murder is an atrocious crime"; "a grievous offense against morality"; "a grievous crime"; "no excess was too monstrous for them to commit" ;

3. (

• grotesque ,
• monstrous

) distorted and unnatural in shape or size; abnormal and hideous; "tales of grotesque serpents eight fathoms long that churned the seas"; "twisted into monstrous shapes" ;