Rare; not readily found; unusual. / Remarkable; exceptional.

(archaic, UK, dialect) Exceedingly, exceptionally.

The state or quality of being uncommon.

comparative form of uncommon: more uncommon

plural of uncommonness

having an abundance situated between common and uncommon.

Not commonable.

To an uncommon degree; unusually or extremely. / Not often; on rare occasions.

superlative form of uncommon: most uncommon

Not commonplace.