Dictionary.com
definitions

kilobit

[kil-uh-bit]
noun Computers.
  1. 1024 (210) bits.
  2. (loosely) 1000 bits. Symbol: Kb

Origin of kilobit

First recorded in 1960–65; kilo- + bit3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for kilobit

kilobit

noun computing
  1. (in general computer contexts, such as data transfer) 1000 bits
  2. (in data-storage contexts) 1024 bits
Abbreviation: Kb, kb
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
kilobit in Science

kilobit

[kĭl′ə-bĭt′]
  1. One thousand bits.
  2. 1,024 (that is, 210) bits. See Note at megabyte.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.