Definition of first thing in English:

first thing

Early in the morning; before anything else: I have to meet Josh first thing tomorrow
More example sentences
  • They had the chance to do that either on Friday night or first thing in the morning before we were to set out.
  • He gets fed first thing in the morning before I go to work and again when I get home.
  • I know that the first thing in the morning I'll be wandering into work on my day off to find it.
See parent entry: first

Definition of first thing in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
deviating from what is standard, normal, or expected