# activation

Pronunciation: US say "ak-tuh-VAY-shuhn" /ˌæktəˈveɪʃən/; UK say "ak-ti-VAY-shuhn" /ˌæktɪˈveɪʃən/

## Noun

1. The act of making something active and effective, or bringing it into a working state.
   - Simple: The act of switching something on so it starts working.
   - _Activation of the emergency plan required approval from two managers._
   - _The software finishes activation automatically once you enter the license key._
2. The promotion of a brand through a dedicated event or marketing campaign.
   - Simple: An event or campaign used to make people notice and care about a brand.
   - _The agency designed an activation that let shoppers sample the product inside the store._
   - _Stadium activations gave fans hands-on experiences with the sponsor's brand._
3. The process that puts molecules into a state in which they can undergo a chemical reaction.
   - Simple: The process of getting molecules ready so they can take part in a reaction.
   - _The enzyme lowers the energy required for activation of the substrate._
   - _Activation of the reactants began only after the temperature rose sharply._
4. In nuclear physics, the creation of a radioactive isotope by exposing a stable element to a stream of neutrons or protons.
   - Simple: The making of a radioactive material by hitting a stable one with tiny particles.
   - _Activation of the cobalt target produced a radioactive isotope within hours._
   - _After prolonged neutron bombardment, activation rendered the sample radioactive._

Source: DictionaryAI, https://dictionaryai.com/define/activation (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).