Fixed or stated; regular; determinate.
Unfailing; infallible.
Known but not specifically named; indeterminate; indefinite; one or some; sometimes used independently as a noun, and meaning certain persons; see also "one".
Not to be doubted or denied; established as a fact.
Sure, positive, not doubting.
Actually existing; sure to happen; inevitable.
Having been determined but not specified.
Unnamed or undescribed members (of).
Not yet resolved, finished, answered, decided or certain.
Used other than figuratively or idiomatically: see up, in, the, air.