sup·pres·sion (sə-prĕshˈən)

1. The act of suppressing or the state of being suppressed.
2. Conscious exclusion of unacceptable desires, thoughts, or memories from the mind.
3. The sudden arrest of the secretion of a fluid, such as urine or bile.
4. The checking or curtailing of an abnormal flow or discharge.
5. The effect of a second genetic mutation that reverses a phenotypic change that had been caused by a previous mutation at a different location on the chromosome.