This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The extortion of money under threat of making public charges of misconduct or the like; blackmail.

"The fact is that my old schoolfellow, Lambert, might well, and indeed with certainty, be said to belong to one of those disreputable gangs of petty scoundrels who form associations for the sake of what is now called chantage, an offence nowadays defined and punished by our legal code."