The word "tallis" can refer to two different things depending on the context, so let's break it down.
Definition: In a religious context, a "tallis" (often spelled "tallit") is a shawl worn by Jewish men during morning prayers. It has special fringes called "tzitzit" at each corner, which are tied in a specific way according to Jewish law.
Understanding "tallis" can help in both religious discussions and historical conversations about music. If you are talking about the prayer shawl, remember it is associated with Jewish traditions.