Definitions

1. noun

A perennial herb of the genus Amaranthus, having white or greenish flowers and a soft, downy stem.

“The garden was overrun with popweed, and it was a struggle to keep it under control.”

2. verb

To grow or spread rapidly, often in an uncontrolled or unwanted manner.

“The new invasive species began to popweed through the entire ecosystem, causing widespread disruption.”