谁能给我一个英文的诗歌的含义?急用!

诗歌（poem）：a composition written in metrical feet forming rhythmical lines
或者
诗歌(poem)：1.A metrical composition; a composition in verse written in certain measures,whether in blank verse or in rhyme,and characterized by imagination and poetic diction; -- contradistinguished from prose; as,the poems of Homer or of Milton.
2.A composition,not in verse,of which the language is
highly imaginative or impassioned; as,a prose poem; the
poems of Ossian.