Often used metaphorically to describe the exclusion of unsuitable elements from a situation or group.

Metaphorical Use

Doesn't always involve physically removing something; it can be abstract, like ideas.

Not Literal

May imply that what is being removed is undesirable or not meeting certain standards.

The term originates from gardening and is still largely used in this context.

Reflects the practice of maintaining a healthy environment by removing invasive or harmful species.

Usually involves physical effort and is often done by hand in a gardening setting.