1
- lacking interest or excitement乏味的, 单调的, 呆板的：
your diet doesn't have to be dull and boring.
你的日常饮食不必单调乏味。
1.1
- archaic (of a person) feeling bored and dispirited〈古〉（人）感觉无聊的, 无生气的, 沮丧的：
she said she wouldn't be dull and lonely.
她说她不会觉得孤独无聊。
2
- lacking brightness, vividness, or sheen不鲜明的, 晦暗的; 无光泽的：
his face glowed in the dull lamplight
在幽暗的灯光下他的脸在发亮
his black hair looked dull.
他的黑头发看上去没有光泽。
2.1
- (of the weather) overcast; gloomy（天气）阴沉的; 昏暗的：
next morning dawned dull.
第二天破晓时天阴沉沉的。
2.2
- (of sound) not clear; muffled（声音）不清晰的, 沉闷的：
a dull thud of hooves.
马蹄沉闷的砰砰声。
2.3
- (of pain) indistinctly felt; not acute（疼痛）隐隐的, 不明显的：
there was a dull pain in his lower jaw.
他的下巴隐隐作痛。
2.4
- (of an edge or blade) blunt（刀口）钝的, 不锋利的：
when cutting hard rock the edge soon became dull.
切割坚硬的石头时, 刀刃很快就变钝了。
3
- (of a person) slow to understand; stupid（人）愚钝的; 愚蠢的, 笨的：
the voice of a teacher talking to a rather dull child.
老师和一个笨孩子谈话的声音。
3.1
- archaic (of a person's senses) not perceiving things distinctly; insensitive〈古〉（感觉）迟钝的, 不敏感的; 麻木的。
3.2
- (of activity) sluggish, slow-moving（行动）迟缓的, 慢腾腾的：
trading was dull and low in volume.
贸易不活跃, 交易量很低。
- make or become dull or less intense（使）变钝; （使）变得迟钝（或不明亮、沉闷）; （使）减轻; （使）削弱：
with obj. time dulls the memory时间使记忆变得模糊
no obj. Albert's eyes dulled a little.艾伯特的眼睛变得有些黯淡。
短语
as dull as dishwater（或ditchwater）
- extremely dull无聊透顶的, 索然无味的。
dull the edge of
- cause to be less keenly felt; reduce the intensity or effectiveness of使减轻; 使迟钝; 削弱…的强度（或效果）：
she'd have to find something to dull the edges of the pain.
她不得不找点东西来缓解疼痛。
派生词
dullish
adjectivedullness
（亦作dulness）noundully
/ˈdʌlˌlɪ/ adverb词源
Old English dol 'stupid', of Germanic origin; related to Dutch dol 'crazy' and German toll 'mad, fantastic, wonderful'.