What does discriminator mean?
A discriminator is fundamentally an entity that makes distinctions. In everyday language it may describe a person who discriminates, though this usage is less common than the word's technical applications. In electronics, a discriminator is a circuit that separates signals based on some property such as frequency or phase — for example, converting frequency modulation into audible sound in an FM radio. In modern computing, the term has gained prominence through machine learning: within a generative adversarial network, the discriminator is the component trained to judge whether a given input is authentic or produced by the generator, effectively acting as a learned critic whose feedback drives the generator to improve. The word derives from the Latin verb 'discernere', meaning to distinguish or separate. Its connotations depend heavily on context — neutral and precise in engineering, but capable of negative overtones when applied to human behaviour involving unjust differentiation.
nounA person or thing that discriminates; in technical use, a device or algorithm that distinguishes between different classes of signals or data.
- A person who discriminates or shows discernment in making distinctions.
- An electronic circuit or algorithm that distinguishes between signals of different characteristics (e.g. frequency or phase).
- In machine learning, a model that classifies inputs as genuine or generated, notably as the opposing network in a generative adversarial network.
"The machine-learning model acts as a discriminator, judging whether each image is real or artificially generated."
"The FM receiver uses a discriminator to convert frequency variations into an audio signal."
"In a GAN, the generator tries to fool the discriminator into accepting its fabricated images."
Regular plural formation by adding -s.
"Modern receivers employ several discriminators to handle different signal types."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of discriminator
Discriminator derives from the Latin verb 'discernere' (to distinguish, separate), formed from 'dis-' (apart) and 'cernere' (to sift, perceive). The English noun arose from the verb 'discriminate', which entered English from the past participle stem 'discriminat-'. It follows the common agent-noun pattern of adding '-or' to a verbal root. Cognates include words sharing the same Latin root across Romance languages, such as French 'discriminant'.
Related word forms
How discriminator is actually used
Neutral to formal register. The sense referring to a person can carry negative connotations when implying unjust treatment, but technical senses are entirely neutral. Predominantly found in engineering and machine learning contexts today.
Easily confused with discriminator
Discriminator is the agent or device that distinguishes, while discrimination is the act or process of distinguishing — or, negatively, unfair treatment based on prejudice.