ACTIVATE

[ac.ti.vate] vb -vat.ed ; -vat.ing vt (1626): to make active or more active: as a (1): to make (as molecules) reactive or more reactive (2): to convert (as a provitamin) into a biologically active derivative b: to make (a substance) radioactive c: to treat (as carbon or alumina) so as to improve adsorptive properties d (1): to set up or formally institute (as a military unit) with the necessary personnel and equipment (2): to put (an individual or unit) on active duty ~ vi: to become active -- ac.ti.va.tion n -- ac.ti.va.tor n