et al.

from The American Heritage® Dictionary of the English Language, 5th Edition.

• abbreviation et alii (and others)

from The Century Dictionary.

• noun An abbreviation of the Latin et alibi, ‘and elsewhere.’
• noun A common abbreviation of Latin et alii (masculine) or et aliæ (feminine), ‘and others’: used in legal captions: as, Smith, Brown, Jones, et al.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• abbreviation And others; to complete a list, especially of people, as authors of a published work.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adverb and others ('et al.' is used as an abbreviation of `et alii' (masculine plural) or `et aliae' (feminine plural) or `et alia' (neuter plural) when referring to a number of people)
• adverb and elsewhere (used when referring to other occurrences in a text)
• adverb and elsewhere (used when referring to other occurrences in a text)
• adverb and others ('et al.' is used as an abbreviation of `et alii' (masculine plural) or `et aliae' (feminine plural) or `et alia' (neuter plural) when referring to a number of people)