Definition of "activation" []

• Making active and effective. (noun)
• The process of making a radioisotope by bombarding a stable element with neutrons or protons. (noun)

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• "On page 3 of the FM3 booklet, the original date of activation is typed in when you first entered México. 30 days before that date is when the first renewal must be applied for."
• "Demonstration, without activation is wasted energy .."
• "Long-term activation of the immune system, as in autoimmune disease, also seems to go along with depression."