meaning
something that one wishes to convey, especially by language

term
a word whose definition is in a glossary

word
a string of characters in a language, which has at least one character

definition
a sequence of words that gives meaning to a term

glossary
a list of difficult or specialized terms, with their definitions,
usually near the end of a book

language
a set of strings of characters, each of which has meaning

book
a printed or written literary work