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    Lethal

    /ˈliːθəl/

    Meaning & Definition

    adjective
    sufficient to cause death.
    The venom from the snake is lethal, capable of killing a person within hours.
    intended to cause death.
    The soldiers were given lethal force instructions during the conflict.
    extremely harmful or destructive.
    The disease has a lethal effect on the population, reducing life expectancy dramatically.

    Etymology

    From Latin 'letalis', from 'letum' meaning 'death'.

    Common Phrases and Expressions

    lethal weapon
    A weapon capable of causing death.
    lethal injection
    A method of executing a person by injecting them with a fatal dose of drugs.
    lethal dose
    The amount of a substance required to cause death.

    Related Words

    mortality
    The state of being subject to death.
    death
    The end of the life of a living organism.
    fatality
    An occurrence of death.

    Slang Meanings

    Extremely effective or successful.
    That new track is just lethal on the dance floor!
    Impressive or awesome.
    Her performance was lethal; she nailed every move.