For definition numbers 2 and 3 a good antonym is "reserved".

As in: formal or self-restrained in manner and relationship; avoiding familiarity or intimacy with others: a quiet, reserved man. [From Dictionary.com]

For definition numbers 2 and 3, a good antonym is “reserved”.

As in:

3. formal or self-restrained in manner and relationship; avoiding familiarity or intimacy with others:
   “a quiet, reserved man.”

_{Source: dictionary.com}