Longman Dictionary of Contemporary English homepage

Topic: PLANTS

Language: Old English
Origin: weod

weed

1 noun
     
weed1
1 [countable]HBP a wild plant growing where it is not wanted that prevents crops or garden flowers from growing properly:
the constant battle against weeds
2 [uncountable]HBP a plant without flowers that grows on water in a large green floating mass [↪ seaweed]
3 [countable] British English informal someone who is weak:
Nigel's such a weed, isn't he?
4

like weeds

in large numbers:
Cars clogged the roads like weeds.
5

the weed

informalDFT cigarettes or tobacco
6 [uncountable] old-fashionedMDD cannabis
7

(widow's) weeds

old useMX black clothes worn by a woman whose husband has died
Definition of weed from the Longman Dictionary of Contemporary English within
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