Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for dull from the 1913 edition of Webster's Revised Unabridged Dictionary. Define dull using one of the most comprehensive free online dictionaries on the web.

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dull
Part of Speech: superlative
Results: 12
6. Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.
7. Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.
Part of Speech: verb
1. To become dull or stupid.
Part of Speech: verb transitive
2. To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
3. To render dim or obscure; to sully; to tarnish.
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