latest

[ley-tist]
noun
  1. the latest, the most recent news, development, disclosure, etc.: This is the latest in personal computers.
Idioms
  1. at the latest, not any later than (a specified time): Be at the airport by 7 o'clock at the latest.

Origin of latest

late Middle English word dating back to 1375–1425; see origin at late, -est1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for at the latest

latest

adjective, adverb
  1. the superlative of late
adjective
  1. most recent, modern, or newthe latest fashions
noun
  1. at the latest no later than the time specified
  2. the latest informal the most recent fashion or development
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

Word Origin and History for at the latest

latest

adj.

superlative of late. The latest "the news" attested from 1886.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with at the latest

at the latest

No later than. For example, We have to be in New York by Monday at the latest. This idiom was first recorded in 1884.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.