The study of speech sounds in language or a language with reference to their distribution and patterning and to tacit rules governing pronunciation.
The sound system of a language: the phonology of English.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.