weed

The term **weed** generally refers to any plant that is considered undesirable, unwanted, or out of place in a particular setting—such as in gardens, lawns, agricultural fields, or natural ecosystems. Weeds often compete with cultivated plants for resources like sunlight, water, and nutrients, and may spread aggressively.

In informal usage, “weed” can also refer to marijuana (cannabis), a plant used for medicinal or recreational purposes.