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3. in on the ground floor

in on the ground floor

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*in on the ground floor

Fig. involved at the very beginning of something. (Alludes to riding in an elevator that will become increasingly crowded as it ascends. You will be able to get in most easily at the lowest level. *Typically: be ~; get ~; let someone ~.) If you are starting a new project, I want to get in on the ground floor. Invest now so you can get in on the ground floor.

See also: floor, ground, on

(get) in on the ground floor

to become involved in something from its beginning Can someone tell me how you get in on the ground floor of a money-making deal like that?

See also: floor, ground, on