Experiencing or showing doubt, sceptical.
Subject to, or causing doubt.
Improbable or unlikely.
Unclear or unreliable.
Suspicious, or of dubious character.
Undecided or of uncertain outcome.
A doubtful person or thing.
Closest in the future, or closest but one if the closest is very soon; of days, sometimes thought to specifically refer to the instance closest to seven days (one week) in the future.
Denotes the one immediately following the current or most recent one.
Nearest in order, succession, or rank; immediately following (or sometimes preceding) in order.
Nearest in place or position, having nothing similar intervening; adjoining.
Nearest in relationship. (See also next of kin.)
In a time, place, rank or sequence closest or following.
On the first subsequent occasion.
So as to follow in time or sequence something previously mentioned.
The one that follows after this one.