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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
fre·quen·cy    Audio Help   [free-kwuhn-see] Pronunciation Key
–noun, plural -cies.
1.Also, frequence. the state or fact of being frequent; frequent occurrence: We are alarmed by the frequency of fires in the neighborhood.
2.rate of occurrence: The doctor has increased the frequency of his visits.
3.Physics.
a.the number of periods or regularly occurring events of any given kind in unit of time, usually in one second.
b.the number of cycles or completed alternations per unit time of a wave or oscillation. Symbol: F; Abbreviation: freq.
4.Mathematics. the number of times a value recurs in a unit change of the independent variable of a given function.
5.Statistics. the number of items occurring in a given category.


[Origin: 1545–55; < L frequentia assembly, multitude, crowd. See frequent, -cy]

1. regularity, repetition, recurrence.
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Encyclopædia Britannica, Inc.
frequency

To learn more about frequency visit Britannica.com

© 2008 Encyclopædia Britannica, Inc.
American Heritage Dictionary - Cite This Source - Share This
fre·quen·cy    Audio Help   (frē'kwən-sē)  Pronunciation Key 
n.   pl. fre·quen·cies
  1. The property or condition of occurring at frequent intervals.
  2. Mathematics & Physics The number of times a specified periodic phenomenon occurs within a specified interval, as:
    1. The number of repetitions of a complete sequence of values of a periodic function per unit variation of an independent variable.
    2. The number of complete cycles of a periodic process occurring per unit time.
    3. The number of repetitions per unit time of a complete waveform, as of an electric current.
    4. The number of measurements in an interval of a frequency distribution.
    5. The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.
  3. Statistics
    1. The number of measurements in an interval of a frequency distribution.
    2. The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.


[Latin frequentia, multitude, from frequēns, frequent-, crowded, numerous, frequent.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
WordNet - Cite This Source - Share This
frequency

noun
1. the number of occurrences within a given time period; "the frequency of modulation was 40 cycles per second"; "the frequency of his seizures increased as he grew older" 
2. the ratio of the number of observations in a statistical category to the total number of observations 
3. the number of observations in a given statistical category 

WordNet® 3.0, © 2006 by Princeton University.
Kernerman English Multilingual Dictionary - Cite This Source - Share This
ˈfrequency1 nounplural ˈfrequencies
the state of happening often
Example: The frequency of her visits surprised him.
Arabic: تَكْرار
Chinese (Simplified): 频繁
Chinese (Traditional): 頻繁
Czech: častost
Danish: hyppighed
Dutch: frequentie
Estonian: sagedus
Finnish: tiuhuus
French: fréquence
German: die Häufigkeit
Greek: συχνότητα
Hungarian: gyakoriság
Icelandic: tíðleiki
Indonesian: kekerapan
Italian: frequenza
Japanese: ひんぱん
Latvian: biežums
Lithuanian: dažnumas
Norwegian: hyppighet, hyppig forekomst
Polish: częstość
Portuguese (Brazil): freqüência
Portuguese (Portugal): frequência
Romanian: regularitate
Russian: частота
Slovak: častosť
Slovenian: pogostnost
Spanish: frecuencia
Swedish: tät förekomst, ideligt upprepande
Turkish: sıklık
ˈfrequency2 noun
(in electricity, radio etc) the number of waves, vibrations etc per second
Example: At what frequency does the sound occur?
Arabic: تَرَدُّد
Chinese (Simplified): 周率
Chinese (Traditional): 周率
Czech: frekvence, kmitočet
Danish: frekvens
Dutch: frequentie
Estonian: sagedus
Finnish: taajuus
French: fréquence
German: die Schwingungszahl, die Frequenz
Greek: συχνότητα (ήχου κτλ.)
Hungarian: frekvencia
Icelandic: tíðni
Indonesian: frekuensi
Italian: frequenza
Japanese: 周波数
Latvian: frekvence
Lithuanian: dažnis
Norwegian: frekvens, svingningstall
Polish: częstotliwość
Portuguese (Brazil): freqüência
Portuguese (Portugal): frequência
Romanian: frecvenţă
Russian: частота
Slovak: kmitočet
Slovenian: frekvenca
Spanish: frecuencia
Swedish: frekvens, svängningstal
Turkish: frekans
ˈfrequency3 noun
a set wavelength on which radio stations regularly broadcast
Example: I regularly listen to this frequency in order to hear my favourite music.
Arabic: ذَبْذَبَه
Chinese (Simplified): 频率
Chinese (Traditional): 頻率
Czech: frekvence
Danish: frekvens; bølgelængde
Dutch: frequentie
Estonian: sagedus
Finnish: taajuus
French: fréquence
German: die Frequenz
Greek: συχνότητα, μήκος κύματος
Hungarian: frekvencia
Icelandic: bylgjulengd, tíðni
Indonesian: frekuensi, gelombang
Italian: frequenza
Japanese: 周波数
Latvian: frekvence
Lithuanian: dažnis
Norwegian: frekvens
Polish: częstotliwość
Portuguese (Brazil): freqüência
Portuguese (Portugal): frequência
Romanian: frecvenţă
Russian: частота
Slovak: frekvencia
Slovenian: frekvenca
Spanish: frecuencia
Swedish: frekvens
Turkish: dalga, frekans
See also: frequently, frequent

Kernerman English Multilingual Dictionary, © 2000-2006 K Dictionaries Ltd.
The American Heritage Science Dictionary - Cite This Source - Share This
frequency    Audio Help   (frē'kwən-sē)  Pronunciation Key 
  1. Physics The rate at which a repeating event occurs, such as the full cycle of a wave. Frequencies are usually measured in hertz. Compare amplitude. See also period.
  2. Mathematics The ratio of the number of occurrences of some event to the number of opportunities for its occurrence.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
frequency

In physics, the number of crests of a wave that move past a given point in a given unit of time. The most common unit of frequency is the hertz (Hz), corresponding to one crest per second. The frequency of a wave can be calculated by dividing the speed of the wave by the wavelength. Thus, in the electromagnetic spectrum, the wavelengths decrease as the frequencies increase, and vice versa.


[Chapter:] Physical Sciences and Mathematics


The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Frequency

Fre"quence\, n. [See Frequency.]

1. A crowd; a throng; a concourse. [Archaic.] --Tennyson.

2. Frequency; abundance. [R.] --Bp. Hall.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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