noun

• (figurative) A blooming period or stage of development; something lovely that gives rich promise.
  "This beauty, in the blossom of my youth, / When my first fire knew no adulterate incense, / Nor I no way to flatter, but my fondness; / […] long did I love this lady, / Long was my travail, long my trade to win her; / With all the duty of my soul, I served her."

verb

• (intransitive) To have, or open into, blossoms; to bloom.
  "ANd the Loꝛde ſpake vnto Moſes ſayenge: ſpeake vnto the childern of Iſrael and take of them / foꝛ euery pꝛyncypall houſſe a rod / of their pꝛinces ouer the houſſes of their fathers: euen .xij. roddes / and wꝛyte euery mans name apon his rod. […] And his rod whom I choſe / ſhall bloſſome: So I wyll make ceaſe from me the grudgynges of the childern of Iſrael which they grudge agenſt you."
• (intransitive) To begin to thrive or flourish.
  "A quiet, studious man, rich in the wisdom that is better than learning, the charity which calls all mankind "brother," the piety that blossoms into character, making it august and lovely."

name

• (rare) A female given name.
  "The resulting craze is probably attributable to a Waialua Elementary guidance teacher, Blossom Galbiso, who introduced the game into O'ahu schoolyards in 1992."