antiweed adjective2 •Opposing or countering weeds (unwanted plants).Unfortunately for Fletcher's antiweed crusade and western farmers in general, this time had already passed. — 2002 •Opposing or countering weed (marijuana).In recent years, the sophistication of the antiweed forces both within Mexico and along the border has necessitated a specialization on the part of those involved in smuggling and dealing. — 1974
