The merriam webster dictionary

Webster's New Collegiate Dictionary with the solid authority of Webster's Third New International Dictionary, ultimate word reference for schools, universities, libraries, courts of law, The National Spelling Bee, and the U.S. Government Printing Office. Guides to spelling, pronunciation, and capitalization; Selected etymologies giving precise word histories Synonyms; Variants and verbal illustrations; Foreign words and phrases; Latest census figures for the United States and Canada; Tables of metric system, weights and measures, money, and planets.