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  1. c640–546? b.c., Greek philosopher, born in Miletus.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for thales


  1. ?624–?546 bc, Greek philosopher, mathematician, and astronomer, born in Miletus. He held that water was the origin of all things and he predicted the solar eclipse of May 28, 585 bc
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

thales in Science


  1. Greek philosopher who was considered by later Greek writers to be a founder of geometry and abstract astronomy. He is said to have accurately predicted a solar eclipse in 585 bce, although this and certain other stories associated with Thales have been questioned by modern scholars.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

thales in Culture



An ancient philosopher of Greece, called by some the first genuine Greek philosopher. He lived about 600 years before Jesus and about 150 years before Socrates.


Thales is known for predicting an eclipse and thus contributing to the idea that the heavens were separate from the gods.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.