in on

Part of it

To be in on something is to be included in knowledge or participation that others lack.

You can be in on the joke, in on the secret, or in on the deal.

The phrase implies insider status—access to information or involvement that isn't available to everyone: Only a few executives were in on the decision.

Related

cognizant · informed · participating · au courant · privy · included · read into · involved · aware · classified · need to know · secret · hush-hush · acquainted · confidential · party to · part of · connected

Opposites
inclusion/knowledge

in onout of the loop

Not kept informed

in the dark · outside of · kept in the dark · uninformed · unaware

participation

in onon the outside

At the outer surface

left out · excluded · shut out · outside · frozen out

Family

on, in, inside, input, onward, onset, intake, incoming, inbound

Familiarity
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Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G