n. 消去, 删去, 廓清

[ noun ]
the deletion of objectionable parts from a literary work
<noun.act>

Expurgation \Ex`pur*ga"tion\, n. [L. expurgatio justification,
excuse: cf. F. expurgation.]
The act of expurgating, purging, or cleansing; purification
from anything noxious, offensive, sinful, or erroneous.
--Milton.