1
general::
Openly, open to public view or access. For example, They've never appeared together in public. [c. 1450] For an antonym, see IN PRIVATE.
American Heritage Idioms
2
general::
Phrase(s): in public
in a place or way so that other people can see or know about something. • It’s illegal to walk naked in public. • John always tries to embarrass me whenever we’re in public.
McGrawhill's American Idioms And Phrasal Verbs