Webster's Revised Unabridged Dictionary · 1913

Blossom

Blossom (blos"sum) , noun

[Old English blosme, blostme, Anglo-Saxon blōsma, blōstma, blossom; akin to Dutch bloesem, Latin fios, and English flower; from the root of English blow to blossom. See Blow to blossom, and compare Bloom a blossom.]

1.
The flower of a plant, or the essential organs of reproduction, with their appendages; florescence; bloom; the flowers of a plant, collectively; as, the blossoms and fruit of a tree; an apple tree in blossom.
Blossoms flaunting in the eye of day. — Longfellow

The term has been applied by some botanists, and is also applied in common usage, to the corolla. It is more commonly used than flower or bloom, when we have reference to the fruit which is to succeed. Thus we use flowers when we speak of plants cultivated for ornament, and bloom in a more general sense, as of flowers in general, or in reference to the beauty of flowers.

2.
A blooming period or stage of development; something lovely that gives rich promise.
In the blossom of my youth. — Massinger
3.
The color of a horse that has white hairs intermixed with sorrel and bay hairs; -- otherwise called peach color.
Collocations (1)
In blossom , having the blossoms open; in bloom.

Blossom ({not transcribed}) , intransitive verb

[Anglo-Saxon blōstmian. See Blossom, n.]

1.
To put forth blossoms or flowers; to bloom; to blow; to flower.
The moving whisper of huge trees that branched And blossomed. — Tennyson
2.
To flourish and prosper; to develop into a superior type.
Israel shall blossom and bud, and full the face of the world with fruit. — Isa. xxvii. 6
3.
to appear or grow as if by blossoming; to spread out rapidly.