a blessing in disguise Definition

blessing
noun

1. A wish or prayer for happiness or success.

Thesaurus: benediction, benison, commendation, sanctification, absolution, baptism, unction, consecration; Antonym: curse, anathema.
2a. relig.
An act which invites the goodness of God to rest upon someone, often expressed by the placing of hands upon their head;
2b. relig.
A short prayer said before or after a meal or church service, etc.
3. A cause of happiness, or sometimes of relief or comfort; a benefit or advantage.

Thesaurus: boon, benefit, advantage, asset, stroke of luck, good fortune, godsend, windfall; Antonym: obstacle.
4. Approval or good wishes.

Example: They married without his blessing

Idiom: a blessing in disguise

Something that has proved to be fortunate after seeming unfortunate.

Idiom: count one's blessings

To be grateful for what one has, rather than unhappy about what one does not have.