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English definition of “lessen”

lessen

verb [I or T]     /ˈlesən/
to make something smaller , less noticeable , etc., or to become smaller , less noticeable , etc.: Corporate executives are keen to embrace " green technology " in order to lessen their dependence on fossil fuels . Increasing security procedures is the only way to lessen the risks of air travel .lessen the impact/importance/influence (of sth) Experts argue that a carbon tax would lessen the influence of special-interest groups in the climate change debate .
(Definition of lessen verb from the Cambridge Business English Dictionary © Cambridge University Press)
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