Definition: A long, semi-circular garment usually worn over a tunic.
The toga was distinctively Roman garment but likely was borrowed from the Etruscan tebenna. It was unusual in that it was both quite long (up to 6 meters) & had a roughly semi-circular shape.
Originally, togas were only around 4 meters long, but over the centuries, they became longer & more ornate, simultaneously becoming more cumbersome & less practical.
Women originally wore the toga, but by the second century BC, women wore the stola, while toga wearing became associated with prostitution & adultery.
During prayer, sacrifice or offerings, part of the toga was used to cover the head. This was called capite velato. This was a distinctively Roman practice & differed from Greek, Etruscan & Jewish practice. See I Cor 11:4