Definify.com
Webster 1913 Edition
Unbidden
{ 
Un-bid′
(ŭn-bĭd′)
, Un-bid′den
, }Adj.
 1. 
Not bidden; not commanded. 
Thorns also and thistles it shall bring thee forth
Unbid
; and thou shalt eat the herb of the field. Milton.
2. 
Uninvited; 
as, 
. unbidden 
guestsShak.
 3. 
Being without a prayer. 
[Obs.] 
Spenser.