Longman Dictionary of

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source
the frequency. A speech sound is a combination of simple sound waves
vibrating at different frequencies and forming a complex sound wave. e.g.:
a simple sound wave
a complex sound wave
The lowest frequency in a complex sound wave is called the fundamental
frequency. It is the same frequency as that at which the vocal cords are
vibrating.
source 1 n
see INFORMATION THEORY
source 2 n
(in CASE GRAMMAR) the place from which someone or something moves or
is moved.
For example, the station in:
He came from the station.
source language 1 n
(in language BORROWING) a language from which words have been taken
into another language. French was the source language for many words
which entered English after the Norman Conquest (1066), e.g. prince,
just, saint, noble, as well as for words which entered English at a later
stage, e.g. garage, restaurant.
Chinese was the source language for Japanese during many long periods
of history. During the 20th century, English became the major source language
for Japanese.
source language 2 n
the language out of which a translation is made (e.g. in a bilingual dictionary).
see also TARGET LANGUAGE 2
source text n
a text that is to be translated into another language
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