noun, adjective Informal.
Why Are There So Many Ways To Say “Hi”?
Read more in this article about some frequently asked questions and fun facts related to our definitions.
Danger! What is the frantic origin of “hello?” (And the source of “hi” may surprise you)
We use hello several times a day to greet people or attract attention. But as prevalent as the word is, “hello” is relatively new. Hello came into existence in the mid-1800s. It is an alteration of hallo, which was an alteration of holla or hollo. These words were used to attract immediate attention and demand that the listener come to a stop or cease what he …
troublesome, perplexing, problematic, hard, arduous, fancy, sophisticated, convoluted, intricate, knotty, difficult, machinery, automation, puzzling, involved, elaborate, mixed, mechanics, robotics, telecommunications
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
adjective hi-tech, high-tech
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