(uncountable, also figuratively) Avoidance of saying or reluctance to say too much; discretion, tight-lippedness; (countable) an instance of acting in this manner.

(uncountable) A silent and reserved nature.

(uncountable) Followed by of: discretion or restraint in the use of something.

(uncountable, proscribed) Often followed by to: hesitancy or reluctance (to do something).

(countable, uncountable, rhetoric, obsolete) Synonym of aposiopesis (“an abrupt breaking-off in speech”)

(transitive, rare) To deliberately not listen or pay attention to; to disregard, to ignore.