noun (1)
\ ˈblüm How to pronounce bloom (audio) \

Definition of bloom

 (Entry 1 of 4)

1 : a mass of wrought iron from the forge or puddling furnace
2 : a bar of iron or steel hammered or rolled from an ingot


noun (2)
plural blooms

Definition of bloom (Entry 2 of 4)

b : the flowering state the roses are in bloom
c : a period of flowering the spring bloom
d(1) : a rapid and excessive growth of a plankton population (as of algae or dinoflagellates) — compare red tide
(2) : a large aggregation of free-swimming organisms : swarm a jellyfish bloom
2a : a state or time of beauty, freshness, and vigor
b : a state or time of high development or achievement a career in full bloom
3 : a surface coating or appearance: such as
a : a delicate powdery coating on some fruits and leaves
b : a rosy appearance of the cheeks broadly : an outward evidence of freshness or healthy vigor
c : a cloudiness on a film of varnish or lacquer
d : a grayish discoloration on chocolate
e : glare caused by an object reflecting too much light into a television camera


bloomed; blooming; blooms

Definition of bloom (Entry 3 of 4)

intransitive verb

1a : to produce or yield flowers
b : to support abundant plant life make the desert bloom
2a(1) : to mature into achievement of one's potential
(2) : to flourish in youthful beauty, freshness, or excellence
b : to shine out : glow
c : to become more apparent or fully expressed (as in flavor or aroma) In all classic sauces and dressings, good oil is the base from which delectable flavors bloom.— Renée Loux Underkoffler
3 : to appear or occur unexpectedly or in remarkable quantity or degree
4 : to become densely populated with microorganisms and especially plankton used of bodies of water

transitive verb

1 obsolete : to cause to bloom
2 : to give bloom to


biographical name
\ ˈblüm How to pronounce Bloom (audio) \

Definition of Bloom (Entry 4 of 4)

Harold 1930–2019 American literary critic

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Examples of bloom in a Sentence

Verb flowers blooming in the garden Their love was just beginning to bloom.

First Known Use of bloom

Noun (1)

before the 12th century, in the meaning defined at sense 1

Noun (2)

13th century, in the meaning defined at sense 1a


14th century, in the meaning defined at intransitive sense 1a

History and Etymology for bloom

Noun (1)

Middle English blome lump of metal, from Old English blōma

Noun (2)

Middle English blome, from Old Norse blōm; akin to Old English blōwan to blossom — more at blow

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Time Traveler for bloom

Time Traveler

The first known use of bloom was before the 12th century

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Dictionary Entries Near bloom




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Cite this Entry

“Bloom.” Dictionary, Merriam-Webster, Accessed 23 Oct. 2021.

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English Language Learners Definition of bloom

: to produce flowers
: to change, grow, or develop fully


\ ˈblüm How to pronounce bloom (audio) \

Kids Definition of bloom

 (Entry 1 of 2)

2 : the period or state of producing flowers The bushes are in bloom.
3 : a condition or time of beauty, freshness, and strength the bloom of youth
4 : the rosy color of the cheek


bloomed; blooming

Kids Definition of bloom (Entry 2 of 2)

1 : to produce flowers This tree blooms in the spring.
2 : to change, grow, or develop fully The children quickly bloomed.

More from Merriam-Webster on bloom

Nglish: Translation of bloom for Spanish Speakers

Britannica English: Translation of bloom for Arabic Speakers


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