Emily Dickinson Lexicon

DULL, v.t.

1. To make dull; to stupefy; as, to dull the senses. – Shak.
2. To blunt; as, to dull a sword or an ax.
3. To make sad or melancholy.
4. To hebetate; to make insensible or slow to perceive; as, to dull the ears; to dull the wits. – Spenser. Ascham.
5. To damp; to render lifeless; as, to dull the attention. – Hooker.
6. To make heavy or slow of motion; as, to dull industry. – Bacon.
7. To sully; to tarnish or cloud; as, the breath dulls a mirror.