[joe_the_user]

I believe the broadest consensus defines consciousness as having a subjective experience.

I could go one further and say "I believe the absolute broadest consensus defines consciousness as having a conscious experience." and only say slightly less vague than your statement.

Conscious, subjectivity, awareness in some of their meanings are just synonyms for some internal experience or other. There's a sense that this internal experience reflects things in a unique way, that it's not controlled by outside constrains, that it reflects a person's unique choices not controlled by any fixed pattern or program. But it's just primarily an intuition.