Destroy completely, hide or conceal, make something indecipherable, impair the function and/or structure of a body cavity, cancel a postage stamp with a postmark.

To completely destroy something, leaving no trace, or to close up or fill a body cavity or vessel with tissue.

(except poetic) Completely destroyed or erased; effaced, obliterated.

(entomology, rare) Of markings on an insect: difficult to distinguish from the background; faint, indistinct.