If something happens at the outset of an event, process, or period of time, it happens at the beginning of it. If something happens from the outset it happens from the beginning and continues to happen. Decide at the outset what kind of learning programme you want to follow From the outset he had put his trust in me, the son of his old friend. at/from the outset at or from the beginning of an event or process set out
the time at which something is supposed to begin; "they got an early start"; "she knew from the get-go that he was the man for her"