activation

C1 · Advanced Uncountable noun Science Technical

n. the process of making a substance or molecule ready to react.

n. the process by which a molecule is prepared to undergo a chemical reaction or a biological process is triggered.

“The activation of certain enzymes helps your body digest food more quickly.”

“Researchers observed that the activation of the T-cells occurred only after exposure to the specific viral protein.”

C1 · Advanced Countable noun Academic · Formal

n. the act of showing off a brand through a special event or campaign to get people interested.

n. the process of increasing brand awareness and engagement through experiential events or integrated marketing campaigns.

“The company planned a massive brand activation at the music festival to reach younger customers.”

“The agency's strategy for the product activation focused on immersive digital experiences rather than traditional television advertisements.”

C2 · Proficiency Uncountable noun Science Technical

n. making a material radioactive by hitting it with tiny particles.

n. the process of inducing radioactivity in a stable isotope by bombarding it with neutrons, protons, or other particles.

“Neutron activation is a technique used to find out what elements are in a sample.”

“The structural components of the reactor underwent significant activation after years of exposure to high-intensity neutron flux.”

C1 · Advanced Countable noun AI

n. the numerical value produced by an artificial neuron after processing its incoming data.

n. the real-valued output generated by a node or layer in an artificial neural network following the application of its weights and non-linear activation function.

“When the image contained a cat, the neuron showed a very high activation.”

“Techniques like activation steering add a steering vector to intermediate layer activations to guide the model toward honest responses without fine-tuning.”