Loss of consciousness due to the interruption of breathing and consequent anoxia.
Loss of consciousness due to the body's inability to deliver oxygen to its tissues, either by the breathing of air lacking oxygen or by the inability of the blood to carry oxygen.
A loss of consciousness when someone faints.
A missed beat or off-beat stress in music resulting in syncopation.
The loss or elision of a sound, from the interior of a word, especially of a vowel sound with loss of a syllable.