A thing that is helpful or beneficial
(Of a companion or friend) close; intimate; favorite
their help was such a boon
A close friend.
A trademark for: a (type of) popular romantic novel published by Mills & Boon Limited.
Ploughing done as a service by a tenant for a lord; an instance of this.
(Frequently with possessive adjective) a best friend.
Used to denote an idealized romantic situation of the kind associated with the fiction published by Mills & Boon Limited