the cardinal number of the set of all positive integers; the smallest transfinite cardinal number.
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- alençon lace,
- alepoudelis, odysseus,
- aleppo boil,
- aleppo gall,
- aleppo pine
Origin of aleph-null
First recorded in 1905–10
Also called a·leph-ze·ro [ah-lif-zeer-oh] /ˈɑ lɪfˈzɪər oʊ/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the smallest infinite cardinal number; the cardinal number of the set of positive integersSymbol: א 0
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The first of the transfinite cardinal numbers, corresponding to the number of elements in the set of positive integers.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.