1.
If someone is ~, they feel alone and unhappy. (LITERARY)
One of the demonstrators, a young woman, sat ~ on the pavement...
ADJ: ADJ n, v-link ADJ, ADJ after v
2.
A ~ hope or attempt is one that you think has no chance of success.
Peasants have left the land in the ~ hope of finding a better life in cities.
ADJ: usu ADJ n