| BLU | a coarse prickly European weed with spikes of blue flowers |
|---|---|
| BLU | a fit of despondency |
| BLU | acute delirium caused by alcohol poisoning |
| BLU | shrub or small tree of western United States having white flowers and blue berries |
| BLU | shrub or small tree of western United States having white flowers and blue berries |
| BLU | wild indigo of the eastern United States having racemes of blue flowers |
| BLU | Australian tree having hard white timber and glossy green leaves with white flowers followed by one-seeded glossy blue fruit |
| BLU | the fruit of the Brisbane quandong tree |
| BLU | a common iris of the eastern United States having blue or blue-violet flowers |
| BLU | widespread weed with pale purple-blue flowers |
| BLU | a variety of arctic fox having a pale gray winter coat |
| BLU | a state of nervous depression |