To act decisively on the basis of information received or deduced.(verb)
To take action against something.(verb)
To affect something.(verb)
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Use "act on" in a sentence
"Granting the stay the government wants would allow it to act on those discharges and also allow it to put recent applicants from gay enlistees in limbo, the group said."
"Probabiliorism which held that it is not lawful to act on the less safe opinion unless it is more probable than the safe opinion."
"In late years the system of Compensationism has arisen, which holds that a compensating reason proportionate to the gravity of the law and to the degree of probability in favour of the existence of the raw, is required in order that a person might lawfully act on the less safe opinion."