As an adjective round
As a noun round
is a circular or spherical object or part of an object or round
can be (archaic|or|dialectal|northern england|scotland) a whisper; whispering.
As a preposition round
is alternative form of around.
As an adverb round
As a verb round
is to shape something into a curve or round
can be (intransitive|archaic|or|dialectal|northern england|scotland) to speak in a low tone; whisper; speak secretly; take counsel.
As a proper noun triangle is
the area comprising the cities of used with "the" except when attributive.