The phrase "absolute contraindication" means that something should definitely not be done or used, as it could be harmful or dangerous. Full definition
Per Dr. Ruth Lawrence, «HIV and HTLV - 1 are the only infectious diseases that are considered absolute contraindications to breastfeeding in developed countries» (Lawrence & Lawrence 2001). (kellymom.com)
Oh, I see, the footnote mentions that ACOG considers previous cesarean an «absolute contraindication.» (skepticalob.com)
Furthermore, the recommendations state that a prior cesarean delivery is an absolute contraindication to planning a home birth due to the risks, including uterine rupture. (aetna.com)