(UK) A newcomer to a place.

(archaic) third-person singular simple present indicative form of loose

A kind of tree, the arborvitae. / (biology) A metaphor used to describe the relationships between organisms, both living and extinct, usually represented with a tree-like diagram.

(intransitive) To clean the interior of a house. / (intransitive, idiomatic) To reform a workplace, organization, etc. by removing undesirable personnel and/or procedures.