Definition of harmless adjective from the Oxford Advanced Learner's Dictionary

harmless

adjective

ˈhɑːmləs

ˈhɑːrmləs

1 harmless (to somebody/something) unable or unlikely to cause damage or harmThe bacteria is harmless to humans.

2 unlikely to upset or offend anyone

Synonym

innocuousIt's just a bit of harmless fun.harmlessly

ˈhɑːmləsli harmlessly pronunciation American

ˈhɑːrmləsli

adverbThe missile fell harmlessly into the sea.His interest in guns started harmlessly enough, but later it became an obsession. harmlessness

ˈhɑːmləsnəs harmlessness pronunciation American

ˈhɑːrmləsnəs

noun [uncountable]