noun. (Judaism) either of two small leather cases containing texts from the Hebrew Scriptures (known collectively as tefillin); traditionally worn (on the forehead and the left arm) by Jewish men during morning prayer.
Example sentences of the word tefillin
1. Noun, singular or mass
The four most common headcoverings for Orthodox Jews, which would in some way cover their foreheads, are the tefillin, the yarmulke, the hat and the tallit.