adjective
Sure in one's mind, positive; absolutely confident in the truth of something.
Not to be doubted or denied; established as a fact.
Sure to happen, inevitable; assured.
Unfailing; infallible.
Fixed; regular; determinate.
Particular and definite, but unspecified or unnamed; used to introduce someone or something without going into further detail.
(euphemistic, preceded by "a") Used to denote that the speaker is referring to a specific person or thing that they do not want to name directly, implying that the listener should infer the identity of the referent.
(preceded by "a", of a person) Named but not previously mentioned.
(preceded by "a", of a person) Used before the name of someone famous that people are expected to know.
(obsolete) Determined; resolved.
determiner
Having been determined but not specified.
pronoun
(with of) Unnamed or undescribed members (of).