'Harmful' definitions:
Definition of 'harmful'
From: WordNet
adjective
Causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking" [ant: harmless]
Definition of 'Harmful'
From: GCIDE
- Harmful \Harm"ful\ (h[aum]rm"f[.u]l), a. Full of harm; injurious; hurtful; mischievous. " Most harmful hazards." --Strype. --{Harm"ful*ly}, adv. -- {Harm"ful*ness}, n. [1913 Webster]
Synonyms of 'harmful'
From: Moby Thesaurus
- adverse,
- antagonistic,
- bad,
- bad for,
- baleful,
- baneful,
- bitchy,
- conflicting,
- contaminated,
- contrary,
- corroding,
- corrosive,
- corrupting,
- corruptive,
- counter,
- counteractive,
- counterproductive,
- cussed,
- damaging,
- dangerous,
- deadly,
- deleterious,
- destructive,
- detrimental,
- difficult,
- disadvantageous,
- disserviceable,
- distressing,
- evil,
- foul,
- hard,
- hateful,
- hazardous,
- hostile,
- hurtful,
- ill,
- in opposition,
- inimical,
- iniquitous,
- injurious,
- insalubrious,
- insanitary,
- invidious,
- lethal,
- malefic,
- maleficent,
- malevolent,
- malicious,
- malign,
- malignant,
- mean,
- mischievous,
- miserable,
- morbific,
- nasty,
- noisome,
- not easy,
- noxious,
- ominous,
- opposed,
- opposing,
- opposite,
- ornery,
- pathogenic,
- peccant,
- pernicious,
- pestiferous,
- poisonous,
- polluted,
- prejudicial,
- rigorous,
- risky,
- scatheful,
- septic,
- sinister,
- stressful,
- tainted,
- toxic,
- troublesome,
- troublous,
- trying,
- unadvantageous,
- unfavorable,
- unhealthful,
- unhealthy,
- unhygienic,
- unprofitable,
- unrewarding,
- unsafe,
- unsanitary,
- untoward,
- unwholesome,
- useless,
- venenate,
- veneniferous,
- venenous,
- venomous,
- vicious,
- virulent,
- wicked,
- worthless,
- wretched