(UK) to have fun in an irresponsible manner

(organic chemistry) Any phthalocyanine having a metal (especially a transition metal) at its core

(biochemistry) Any of a group of proteases present in Streptomyces griseus

The act of secluding, shutting out or keeping apart. / The state of being secluded or shut out, as from company, society, the world, etc.; solitude. / A secluded, isolated or private place.