1
- a flower, especially one cultivated for its beauty（尤指供观赏的）花：
an exotic bloom.
一朵异国情调的花。
1.1
- mass noun the state or period of flowering开花, 开花期：
the apple trees were in bloom.
苹果树正在开花。
1.2
- mass noun the state or period of greatest beauty, freshness, or vigour最美（或最富于青春活力）的状态（或时期）, 花季, 全盛期：
a young girl, still in the bloom of youth.
仍处于青春花季的少女。
1.3
- in sing. a youthful or healthy glow in a person's complexion青春容光, 健康的容颜：
her face had lost its usual bloom.
她的脸失去了常有的光彩。
1.4
- mass noun a full bright sound, especially in a musical recording（尤指音乐录音中）饱满响亮的声音：
the remastering has lost some of the bloom of the strings.
重新制作的母盘丧失了弦乐器的活力感。
2
- a delicate powdery surface deposit on certain fresh fruits, leaves, or stems（新鲜水果、叶子或茎表面上的）粉衣, 粉霜。
2.1
- mass noun a greyish-white appearance on chocolate caused by cocoa butter rising to the surface（巧克力的）起霜。
2.2
- short for ALGAL BLOOM.ALGAL BLOOM的简称。
1
- no obj. produce flowers; be in flower开花; 在开花, 处于花期：
a chalk pit where cowslips bloomed.
开着野樱草花的白垩矿场。
1.1
- come into or be in full beauty or health; flourish风姿绰约, 容光焕发; 繁荣, 兴旺：
the children had bloomed in the soft Devonshire air.
孩子们是在德文郡和煦的空气中长大的。
1.2
- (of fire, colour, or light) become radiant and glowing（火, 色彩, 光）发亮, 发光：
colour bloomed in her cheeks.
她的面颊透出光泽。
2
- with obj. technical coat (a lens) with a special surface layer so as to reduce reflection from its surface〈技〉给（透镜）敷膜。
短语
the bloom is off the rose
- N. Amer. the thing in question is no longer new, fresh, or exciting〈北美〉明日黄花; 已失去新颖感; 已不再引人注目。
词源
Middle English: from Old Norse blóm 'flower, blossom', blómi 'prosperity', blómar 'flowers'.