Bondage is, by definition, the state of being bound. According to dictionaries, this could mean a person is enslaved to a master and is not free because of that. Another meaning Is a lack of freedom because someone or something controls their life. An informal usage of the word is to use rope and chains for sexual pleasure.
http://www.macmillandictionary.com/us/d ... an/bondage
It is my opinion that "True Bondage" should not be a part of BDSM. Imposing restrictions on a person without consent (freedom to choose) is immoral, illegal, and inappropriate within BDSM.
Within BDSM, I would consider any use of rope, chain, leather, or other matterials to restrict a person's movement to be an act of bondage. This includes chest harnesses which most rope bunnies consider fun, just tying or handcuffing the hands together, and mummification. I prefere bondage that is inescapable; Shibari frequently is not (also frequently very restrictive and inescapable). A good instance of bondage is when all people involved are pleased with the negotiations, application, and outcome. I feel that my prefered mode of bondage cannot and should not dictate to others. What works for me scares most people when they see my medical cuffs. There is not even any rope, chains, or leather! Still just as true of a form of bondage as any other.
So, what is "Truly Bondage"? It is a closed minded opinion from someone who refuses to see beyond their own little world. Within BDSM, the words "Truly" or "True" are rarely used outside of Internet forums. Often times, these words are used to pull new people to their group to keep them for themselves. Be cautious with anyone claiming to "Truly" do anything, let alone bondage. Most people with real experience understand how little they know and understand bondage. Shibari "Masters" are called that by others; the "Masters" themselves are still trying to learn and practice more to truly "Master" Shibari. In my experience and opinion (also matching many writings on Fetlife), those who claim to "Truly" do bondage often have no real experience away from the Internet.
I hope you seek to truly understand bondage and learn what truly works for you. There is no need to label it anything beyond your preference. RACK (Risk Aware Consentual Kink) it up and remember SSC (Safe Sane Consentual)!