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Browse key terms and definitions across all GCSE subjects. Search by keyword or filter by subject and exam board.
23,110 key terms
Direct address
Communication directed towards the audience, for example when a character speaks to viewers through the camera.
Direct address
A character speaking directly to the audience, rather than only to other characters within the story.
Direct aggression
An aggressive act involving deliberate physical contact with another participant, such as a boxing punch.
Direct contact
Physical transfer between an infected organism or contaminated material and a new host, without transmission through air or water.
Direct cost
An expense attributable to making a particular product, such as its materials or the labour used to manufacture it.
Direct cost
An expense directly associated with providing a service, such as paying staff to deliver mental health care.
Direct current
An electric current that flows in one direction only.
Direct current (d.c.)
An electric current that flows in one direction.
Direct current (d.c.)
An electric current in which charge moves in one direction only.
Direct current (d.c.)
An electric current in which charge moves in one direction only.
Direct current (DC)
Current that flows in only one direction, although its size may vary.
Direct current (DC)
An electric current that always flows in the same direction.
Direct-current (d.c.) circuit
A circuit supplied by a direct potential difference, so conventional current travels in one direction.
Direct democracy
A system in which eligible citizens debate and vote on decisions themselves rather than choosing representatives to make all decisions for them.
Direct democracy
A form of democracy in which citizens vote directly on decisions or laws rather than electing representatives to decide for them.
Direct discrimination
Treating someone less favourably because of a characteristic such as their religion or belief, including a characteristic they are assumed to have.
Direct distribution
Selling from a producer to a final customer without a wholesaler or retailer acting as an intermediary.
Direct effect
A change caused immediately by an activity, such as construction adding weight to a cliff.
Direct intervention
The use of a country’s own armed forces in another country’s conflict. In 1585, Elizabeth sent English troops to support the Dutch rebels against Spain.
Direction
The way in which a vector acts or points, stated using words, a bearing or a sign relative to a chosen positive direction.
Direction of travel
The direction in which a wave and its energy propagate away from the source.
Directly proportional
A relationship in which multiplying one quantity by a factor multiplies the other quantity by the same factor; its graph is a straight line through the origin.
Directly proportional
A relationship in which multiplying one variable by a particular factor multiplies the other variable by the same factor.
Direct mode of address
A way of addressing the audience directly, for example when a performer looks towards the camera.
Director
A person responsible for the overall direction and performance of a company, including its objectives and major decisions.
Direct potential difference
A potential difference whose polarity stays the same: the positive and negative terminals do not swap.
Direct potential difference (d.c.)
A potential difference with a fixed polarity, so it acts in one direction only.
Direct proportion
A relationship in which multiplying one quantity by a factor multiplies the other by the same factor.
Direct proportion
A relationship in which one quantity changes by the same factor as another, so their ratio remains constant.
Direct proportion
A relationship in which multiplying one quantity by a factor multiplies the other by the same factor.
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