Pure poetry is poetry written chiefly for its own aesthetic effect rather than to teach a lesson, argue a case, or preach a moral. It aims to create feeling, atmosphere, and musical language, with the poem's beauty and emotional impact taking priority over explanation or instruction.
The phrase is often used in contrast with didactic verse, though many poems blend beauty with ideas. In practice, "pure poetry" usually describes work that feels concentrated, lyrical, and self-contained.
Example
Moonlight silvers the pond,
A heron folds its wings,
And all the dark is listening
To what the quiet sings.