Definition of in debt:
(n) :
a cut or notch in the margin of anything, or a recess like a notch; a stamp; an impression
(v) :
to notch; to jag; to cut into points like a row of teeth; as, to indent the edge of paper; to dent; to stamp or to press in; to impress; as, indent a smooth surface with a hammer; to indent wax with a stamp