Happening or occurring frequently, with repetition.
Of a decimal: having a set of digits that is repeated indefinitely.
A recurrence; a coming round again.
Particular, characteristic.
Of a rare quality, unusual.
Being the only one of its kind; unequaled, unparalleled or unmatched.
Of a feature, such that only one holder has it.
A thing without a like; something unequalled or unparallelled; one of a kind.