Definition of "unfortunately" in English

adverb

1. Happening through bad luck, or because of some unfortunate event.

   • He unfortunately placed his hand on a loose brick.
   • There were an unfortunately large number of misprints.

2. Used (as a parenthetical word, often a sentence adverb) to express disappointment, compassion, sorrow, regret, or grief.

   • The houses which burned down could have been saved. Unfortunately, the fire truck had broken down on the way.