The commonly spoken definition of asteya is non-stealing, or to not steal. It’s kind of the like Thou shalt not steal guiding principle along the path to the Light of the Soul.

However, I have come to define asteya as having no alternative motivations in relationships. It is not hard to find the connection between the two, for if one has no alternative motivations in relationships, they tend not to steal.

It can also mean to be transparent, for those who are transparent can be trusted with the Truth.
(The definition of asteya is part of my series gained from the Yoga Journal Conference, such as Ahimsa and Satya.)