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1. a person employed to collect debts, rents, etc.
2. the head of a district administration in India
3. a person who collects or amasses objects as a hobby
4. Electronics the region in a transistor into which charge carriers flow from the base



in agricultural irrigation, a drainage pipe or canal that receives water from the regulating part of an irrigation network (drainage gutters) and sends it out of the area being drained.


A semiconductive region through which a primary flow of charge carriers leaves the base of a transistor; the electrode or terminal connected to this region is also called the collector.
An electrode that collects electrons or ions which have completed their functions within an electron tube; a collector receives electrons after they have done useful work, whereas an anode receives electrons whose useful work is to be done outside the tube. Also known as electron collector.
A class of instruments employed to determine the electric potential at a point in the atmosphere, and ultimately the atmospheric electric field; all collectors consist of some device for rapidly bringing a conductor to the same potential as the air immediately surrounding it, plus some form of electrometer for measuring the difference in potential between the equilibrated collector and the earth itself; collectors differ widely in their speed of response to atmospheric potential changes.

solar collector

A device designed to absorb radiation from the sun and transfer this energy to a fluid which passes through the collector.


accumulatorclick for a larger image
accumulatorclick for a larger image
i. A reservoir that supplies fluid under pressure, when desired. In a typical hydraulic system, it consists of a steel cylinder closed at one end and connected to the pressure line at the other, as well as a floating piston. The piston separates hydraulic fluid from compressed nitrogen/air. Hydraulic fluid under pressure can be stored in the system. The accumulator reduces the pump's peak demands, dampens the pressure ripple, and acts as a reserve of fluid and an emergency power source.
ii. A device sometimes incorporated into the fuel system of a gas turbine engine to store and release fuel under pressure as an aid in starting. Also called a collector.
iii. A device for storing fuel in a fuel tank for inverted flying.
iv. In pneumatic and oxygen systems, the reservoir where compressed air or oxygen is stored.
v. An electrical storage battery that can be recharged.


One side of a bipolar transistor. When the base is pulsed, current flows from the emitter to the collector, or vice versa depending on the design. See drain.
References in classic literature ?
Mrs Kenwigs's relation is a public man, and that he knows, George, and that he can bear; but putting Mrs Kenwigs out of the question (if I COULD put Mrs Kenwigs out of the question on such an occasion as this), I have the honour to be connected with the collector by marriage; and I cannot allow these remarks in my--' Mr Kenwigs was going to say 'house,' but he rounded the sentence with 'apartments'.
Oh, uncle, I am SO glad to see you,' said Mrs Kenwigs, kissing the collector affectionately on both cheeks.
Many happy returns of the day, my dear,' replied the collector, returning the compliment.
Here was a collector of water- rates, without his book, without his pen and ink, without his double knock, without his intimidation, kissing--actually kissing--an agreeable female, and leaving taxes, summonses, notices that he had called, or announcements that he would never call again, for two quarters' due, wholly out of the question.
Anywheres, my dear,' said the collector, 'I am not particular.
Mr Lillyvick,' said Kenwigs, addressing the collector, 'some friends here, sir, are very anxious for the honour of--thank you--Mr and Mrs Cutler, Mr Lillyvick.
Love him," I think, my dear,' said the collector, firmly.
That I am sure I shall' replied the collector, glancing at the punch-mixer.
June 16, 2015 /PRNewswire/ -- American Collectors Insurance, a leading insurer of collector cars and collectibles, announced the launch of its new brand which includes a new logo, color scheme, and website.
LAHORE -- Chairman Federal Board of Revenue, Ansar Javed ordered the immediate transfers of Several Additional Collectors, Deputy Collectors and Assistant Collectors of Model Customs Collectorate and Appraisement Collectorate, Lahore.
A cross referencing system links the line drawings of shapes to be found in Paul Gardner's THE GLASS OF FREDERICK CARDER with auction records and references to photos in the nine books cited here: the result is an invaluable index and cross-linked reference Steuben collectors will find essential.
These notes help collectors get a sense for what makes each doll valuable, what photos are missing details, and what features enhance a doll's appearance.