Definition of "tamp down" []

• Press down tightly (verb)

WordNet. Princeton University. 2010.

• "Dr. Baer added the drug Imuran, an immunosuppressant developed to help prevent the bodies of transplant patients from rejecting their new organs, to help tamp down her overenthusiastic immune system."
• "He had the strength to man the press, tamp down the graded fleeces into massive bales, but a gun shearer could make more money."
• "“Uncovering its potential may lead to the development of growth factor–like drugs that will improve the intrinsic ability of neurons to regenerate and speed the growth of damaged axons in the body—without the side effects that come with drugs that tamp down T-cell and B-cell interactions.”"