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1. A phrase used to introduce the first topic one wants to address. I do want to hear about your day, but first off, let me tell you what the wedding planner had to say. First off at today's assembly, we have our sixth grade spelling bee.
2. At once; in the beginning. You should have told your new employer about this conflict of interest first off.
first; the first thing. (Almost the same as first of all.) He ordered soup first off. First off, we'll find a place to live.
From the start, immediately. For example, He said to wash the car first off, or Why wasn't she told first off? [Colloquial; late 1800s] Also see under first and foremost; first thing.
first offas a first point; first of all. informal, chiefly North American
1991 Globe & Mail (Toronto) First off, I wouldn't worry about the ‘fashionability’ of any particular garment. If you'd like to wear something, then wear it.