Noun

1. A blossom; the flower of a plant; an expanded bud.
2. Flowers, collectively.
3. The opening of flowers in general; the state of blossoming or of having the flowers open.

   The cherry trees are in bloom.

4. A state or time of beauty, freshness, and vigor/vigour; an opening to higher perfection, analogous to that of buds into blossoms.

   the bloom of youth

5. The delicate, powdery coating upon certain growing or newly-gathered fruits or leaves, as on grapes, plums, etc.
6. Anything giving an appearance of attractive freshness.
7. The clouded appearance which varnish sometimes takes upon the surface of a picture.
8. A yellowish deposit or powdery coating which appears on well-tanned leather. (Knight.)
9. A popular term for a bright-hued variety of some minerals.

   the rose-red cobalt bloom

10. A white area of cocoa butter that forms on the surface of chocolate when warmed and cooled.

Synonyms

• (flower of a plant): blossom, flower
• (opening of flowers): blossom, flower
• (anything giving an appearance of attractive freshness): flush, glow

Verb

1. To cause to blossom; to make flourish.
2. To bestow a bloom upon; to make blooming or radiant.
3. Of a plant, to produce blooms; to open its blooms.
4. Of a person, business, etc, to flourish.

Synonyms

• (open its blooms): blossom, flower
• (flourish) blossom, flourish, thrive

Noun

1. The spongy mass of metal formed in a furnace by the smelting process.
   • 1957, H.R. Schubert, History of the British Iron and Steel Industry, p. 26:

     These metallic bodies gradually increasing in volume finally conglomerate into a larger mass, the bloom, which is extracted from the furnace with tongs.