concordance

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Agreement; concord.
2. n. An alphabetical index of all the words in a text or corpus of texts, showing every contextual occurrence of a word: a concordance of Shakespeare's works.
3. n. Genetics The presence of a given trait in both members of a pair of twins.

Century Dictionary and Cyclopedia

1. n. The state of being concordant; agreement; harmony.
2. n. The knowledge concerning the sympathies and concordances between the mind and body.
3. n. In grammar, concord.
4. n. A classified collection of the different passages of a work, as of the Bible or the plays of Shakspere, with references to the places of their occurrence. A verbal concordance consists of an alphabetical list of the principal words used in the work, under each of which references to the passages in which it is found are arranged in order, generally with citation of the essential part of each. A real concordance is an alphabetical index of subjects. (Compare harmony in a similar sense.)
5. n. In music, concord or consonance in the technical sense of these words: opposed to dissonance or discord.

Wiktionary

1. n. agreement; accordance; consonance
2. n. concord; agreement.
3. n. An alphabetical verbal index showing the places in the text of a book where each principal word may be found, with its immediate context in each place.
4. n. a list of occurrences of a word or phrase from a corpus, with the immediate context.

GNU Webster's 1913

1. n. Agreement; accordance.
2. n. Concord; agreement.
3. n. An alphabetical verbal index showing the places in the text of a book where each principal word may be found, with its immediate context in each place.
4. n. A topical index or orderly analysis of the contents of a book.

WordNet 3.0

1. n. agreement of opinions
2. n. an index of all main words in a book along with their immediate contexts
3. n. a harmonious state of things in general and of their properties (as of colors and sounds); congruity of parts with one another and with the whole