Definition of "abed"

Not to be abed after midnight

c. 1564–1616, William Shakespeare, Twelfth Night, II, iii

[She] is sick abed.

1883, Adele Marion Fielde, “倒 (tó̤)”, in A Pronouncing and Defining Dictionary of the Swatow Dialect, Arranged According to Syllables and Tones, Shanghai: American Presbyterian Mission Press, page 560

The world was awake to the 2nd of May, but Mayfair is not the world, and even the menials of Mayfair lie long abed.

1922, Michael Arlen, “Ep./4/2”, in “Piracy”: A Romantic Chronicle of These Days

Who can lie peacefully abed, while the darkness holds some secret?

1948, Alan Paton, chapter 12, in Cry, the Beloved Country, London: Jonathan Cape

I mean, she's brought a-bed

c. 1564–1616, William Shakespeare, Titus Andronicus, IV, ii