first thing

idiom

: before anything else : right away : very early
I'll be back first thing (on) Monday morning.
She promised to call first thing in the morning.

Dictionary Entries Near first thing

first-string

first thing

first things first

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“First thing.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first%20thing. Accessed 31 Mar. 2023.

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