poesy UK /ˈpəʊɪzi/US /ˈpoʊɪzi/noun 3verb 1forms 3 noun3 •The art or composition of poetry. •A poem. •(no longer used) The class of literature comprising poems.I know not well how to excuse him, in that hee deemed his Poesie worthy to be published. — 1603 verb1 •(no longer used) To write or perform poetry. formspoesied · poesying · poesies