first of all

• Locution adverbiale servant à introduire le premier point, la première étape ou la première raison dans une énumération, souvent à l'oral ou à l'écrit.

A transitional phrase used to introduce the first point, step, or reason in a sequence, often in speech or writing.

1. Sequence markerA2formal

   Used to introduce the first point or step in a series.

   tout d'abord

   • First of all, let me thank everyone for coming.
   • First of all, we need to gather the necessary materials.
   • First of all, I want to clarify the main objective.

2. Emphasis on priorityA2informal

   Used to emphasize that something is the most important or initial consideration.

   avant tout

   • First of all, you should apologize for your mistake.
   • First of all, let's make sure everyone is safe.
   • First of all, I need to finish this report.