Definition of Vocabulary

According to Webster’s Ninth Collegiate Dictionary (1978:1320), Vocabulary is:

- A  list  or  collection  of words  and  phrase  usually  alphabetically  arranged  and explained or defined.

- A sum or stock of words employed by a language group individual or work or in a field of knowledge.

- A list or collection of terms or codes available for use.

 There are some experts who give definition of vocabulary, Evelyn Hatch and Cheryl Brown (1995:1) define vocabulary as a list or set of words for a particular language or a list or set of word that individual speaker of language might use.

Furthermore Webster Dictionary (1935:1073) noted that, vocabulary is “A list or collection of words usually alphabetically arranged and explained or lexicon, stock of words use in language or by class, individual, etc.”

While according to Roget (1980:1036), Vocabulary is:

- An  alphabetical  list  of  words  often  defined  or  translated,  the  vocabulary includes idioms and two words verb.

- All the word of Language.

- Specialized expression indigenous to a particular fields, subject, trade or subculture.