(martial arts) The highest belt colour in various martial arts. / (martial arts) Someone who has attained the black belt in martial arts. / (figuratively, colloquial) Great skill in any field.

An eye which has been bruised showing noticeable hematoma, especially after receiving a blow. / (figuratively) A defeat. / (figuratively) Damage to a reputation.

(physics) Alternative form of blackbody / Used other than figuratively or idiomatically: see black, body.

(idiomatic) Explicitly, in writing, clearly and without doubt or misunderstanding, without any grey areas. / (literally) Using shades of gray rather than color.

(intransitive) To participate in a black market. / (transitive) To sell in a black market.

Traded on the black market. / Contraband, bootleg or smuggled.

A penalty card issued by an official in several sports for infractions. / (fencing) The most severe of penalties, which results in the fencer being expelled from the match.

trade that is in violation of restrictions, rationing, or price controls / the people who engage in such trade (considered as a group), or that sector of the economy

A plant belonging to either of two closely related species, Rubus leucodermis or Rubus occidentalis, both native to North America. / Rubus coreanus, native to Korea, Japan, and China

European black pine, Pinus nigra / Japanese black pine, Pinus thunbergii / Jeffrey pine, Pinus jeffreyi / Prumnopitys taxifolia, matai, a New Zealand conifer.