Most Vedic gods are named for what they do. Aditi is named for what is not there. The word is built from the negative prefix and diti, a binding or a bond, so the name means unbound, unlimited, free of restraint, and it is used as an ordinary abstract noun in the hymns as well as a divine name. Freedom and the goddess who is freedom are not clearly separable in the language, and translators have to decide sentence by sentence which one a verse is asking for.
That gives her an unusually practical role for so abstract a figure. Vedic religion took guilt seriously as something that ties a person, and the bonds of Varuna are a real image of a real anxiety. Aditi is who you ask when you want them off. Hymns request aditi from sin, from disease, from the consequences of an oath badly kept, and the request is the same word as the goddess. She is also asked for wide space, uru loka, the room to move that a small or hemmed-in life does not have.
The famous verse that identifies her with sky, air, mother, father and son, with all the gods and all people born and unborn, is not pantheism arriving early. It belongs to a Vedic habit of pushing a name outward until it covers everything within its range, and the range of boundlessness is everything by definition. In later literature she is more domesticated, the wife of the sage Kashyapa and the mother of the gods, set against her sister Diti, whose name is the bond her own name denies and whose sons are the Daityas, the gods' opponents.