1. To cause someone, or oneself, to become overly dependent on something or a person: Joyce, who was evidently addicted to and overly dependent on television, liked watching TV so much that she totally broke down and cried when a storm caused a temporary loss of electrical power and she couldn't watch anything for over an hour.

There is a significantly increasing number of people who are addicting themselves to foods that make them overly fat and unhealthy.

2. Etymology: from ad-, "to" + dicere, "to say, to declare".