Of the mind, thoughts, desires, etc.: Aimless passing from object to object.

Wandering of the mind, thoughts, spirit, etc. (Mentioned as one of the ‘branches’ of Accidia or Sloth, one of the seven mortal sins.)

figurative. The action or fact of wandering or digressing in mind, opinion, thought, etc.; an instance of this. (Cf. 3.)

Listless or aimless idling or contemplation. Cf. mooning, n. 1.

Listless or aimless behaviour; idle musing or contemplation; love-struck dreaming; an instance of this. Cf. moon, v. 2.