An extremely adhesive viscid substance, usually made of the middle bark of the holly, by boiling, fermenting, and cleansing it. When a twig is smeared with this substance it will hold small birds which may light upon it. Hence: Anything which insnares.
- A sticky substance that is smeared on branches or twigs to capture small birds.
- Something that captures or ensnares.
- To smear with birdlime.
- To catch with or as if with birdlime.