echo chamber, n.Definitions

An Echo chamber (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠what replaces discursive space once the other disappears: self-indoctrination until the only voice one hears is one's own.

An Echo chamber (n.) matters ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠less for the listeners it reaches than for the mainstream editors it frightens; the right's has a power over the press no liberal institution can match.