a shortened or condensed form of a book, speech, etc., that still retains the basic contents

an abridgment of Tolstoy's War and Peace.

the act or process of abridging.

the state of being abridged.

reduction or curtailment

abridgment of civil rights.

noun

abstract , brief , condensation , epitome , breviary , compend , compendium , curtailment , decrease , digest , diminution , lessening , outline , reduction , sketch , summary , synopsis