Definition of "palely"

O what can ail thee, knight-at-arms, / Alone and palely loitering? / The sedge has withered from the lake, / And no birds sing.

1819, John Keats, La Belle Dame sans Merci, stanza 1

The people are palely prosperous. They lead monotonous lives.

1907, Anne Douglas Sedgwick, A Fountain Sealed‎, Chapter

It was a warm dark night of faint clouds through which the moon shone palely as through a thin silk canopy.

1921, John Dos Passos, Three Soldiers‎, Part Two