an unwanted wild plant, especially one which prevents crops or garden flowers from growing properly
take weeds out of
take away what is useless
"weed the garden"
Grass is a weed in a flower bed but not in a lawn.
出自： R. Quirk
Kill off all perennial weeds, such as..nettles.
An aged mendicant in tatter'd weeds.
He had seen Macindoe in the border weeding.
出自： Julia Hamilton
Read over your composition and weed out every sentence that is not about the subject.
The troublemakers must be weeded out and sent elsewhere.
The worthless books should be weeded out from your library.