first thing


Before anything else; without delay. For example, Tom was supposed to call him first thing in the morning. [Late 1500s] Also see under first and foremost; first off.

Words Nearby first thing

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