Other forms: blooms, blooming, bloomed
To bloom is to open out into flower. The roses are blooming, bloom in May, in full bloom.
Bloom is used of flowers and blossom of trees, though the line is not strict. As a noun, a bloom is a single flower or the state of flowering, and in full bloom is the fixed phrase. Bloom also means the fine powdery coating on a grape or a plum, and an algal bloom is a sudden explosion of algae in water. Figuratively, to bloom is to flourish: she bloomed in that job.
1verbbloomTo open out into flower.
“The whole hedge blooms for about ten days in May.”
2nounstateA flower, or the state of flowering.
“The garden is in full bloom by the second week of June.”
bloom is a flowering.
Old Norse blom is Germanic and related to Latin flos, a flower — so bloom, blossom, flower and flourish are all one distant family, arriving in English by three different routes.
Proto-Indo-European
*bʰleh₃-
Proto-Germanic
*blōmô — flower
Old Norse
blóm
Middle English
blome
English, today
bloom
From Middle English blome, from Old Norse blóm, from Proto-Germanic blōmô (“flower”). a doublet of of bloom (“spongy mass of metal”); see there for more.
Etymology from Wiktionary, CC BY-SA
Practised in Trees & Flowers