1. the principal entry of an item in a reference text, often placed in alphabetical order.
2. Library Science.the principal, complete entry of an item in a catalog or bibliography, giving full information on the item, often including its location, and the form by which the item is to be consistently identified and cited. Cf. added entry.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.