Meaning : Having more than one decidedly dissimilar aspects or qualities.
Example :
A double (or dual) role for an actor.
The office of a clergyman is twofold; public preaching and private influence.
Every episode has its double and treble meaning.
Synonyms : double, three-fold, threefold, treble, two-fold, twofold
Meaning : A grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural).
Example :
Ancient Greek had the dual form but it has merged with the plural form in modern Greek.