an expression of congratulations and best wishes, used chiefly by Jews: A chorus of mazel tovs greeted the newlyweds as they circulated from table to table.
interjection
2.
Congratulations!; Best wishes!: “Mazel tov,” Grandpa said as he thrust a five-dollar bill into my pocket. “I'm so proud of you!”
Also, mazal tov.
Origin: 1860–65; < Yiddishmazltov < Hebrewmazzāl tōbh literally, good luck