Definition of frequency
1 : the fact or condition of occurring frequently
2 a : the number of times that a periodic function repeats the same sequence of values during a unit variation of the independent variable b : the number, proportion, or percentage of items in a particular category in a set of data
3 : the number of repetitions of a periodic process in a unit of time: as a : the number of complete alternations per second of an alternating current b : the number of complete oscillations per second of energy (as sound or electromagnetic radiation) in the form of waves
Examples of frequency in a sentence
the alarming frequency of serious automobile accidents caused by young drivers
The frequency of student errors was frustrating to the young teacher.
Our visits decreased in frequency.
Errors were occurring with increasing frequency.
a sound wave of high frequency
waves having very different frequencies from one another
a current having a frequency of 60 hertz
a radio frequency of 30 megahertz
First Known Use of frequency
FREQUENCY Defined for Kids
Definition of frequency for Students
1 : frequent repetition <Rain fell with frequency.>
2 : rate of repetition <She went with increasing frequency.>
3 : the number of waves of sound or energy that pass by a point every second <Tune the stereo to receive a specific frequency of radio waves.>
Medical Definition of frequency
1: the number of individuals in a single class when objects are classified according to variations in a set of one or more specified attributes
2: the number of repetitions of a periodic process in a unit of time
Learn More about frequency
Thesaurus: All synonyms and antonyms for "frequency" Medical Dictionary: Definition of "frequency" Spanish Central: Translation of "frequency" Nglish: Translation of "frequency" for Spanish speakers Britannica English: Translation of "frequency" for Arabic speakers Britannica.com: Encyclopedia article about "frequency"
Seen and Heard
What made you want to look up frequency? Please tell us where you read or heard it (including the quote, if possible).