Merriam-Webster Collegiate Dictionary - swoon

 I. intransitive verb  Etymology: Middle English swounen, probably back-formation from swouning, swowening, from iswowen, aswoune, from Old English geswogen in a ~  Date: 13th century  1.  a. faint  b. to become enraptured ~ing with joy  2. droop, fade  • ~er noun  • ~ingly adverb  II. noun  Date: 13th century  1.  a. a partial or total loss of consciousness  b. a state of bewilderment or ecstasy ; daze, rapture  2. a state of suspended animation ; torpor  • ~y adjective