1. To suggest the inadvisability of something; for example, a medical treatment: Certain medications are contraindicated during pregnancy because of the danger they can pose for the unborn baby.
2. To make a treatment or procedure unacceptable because of a particular condition or circumstance: Some specific exercises in the fitness studio are contraindicated for people with heart problems.
3. Etymology: from Latin contra, "against" + indicere, "to proclaim" from Latin indicare, "to declare, to dictate".