a belief or goal which is unattainable despite the pursuer's high hopes

listen to the pronunciation of a belief or goal which is unattainable despite the pursuer's high hopes
English - English
impossible dream

Tell me before I seek worthier pastures / And thereby restore self-esteem / How can you be so short-sighted / To look never further than this week or next week / To have no impossible dream? -Antonio Banderas' character in Evita.