A high-context culture is one where

The high context culture is one where much of the information stays unspoken and is understood implicitly.

Shared background, relationships and setting carry meaning that words leave unsaid.

Saying much information is spoken plainly describes a low context culture instead.

Claiming most people use sign language confuses a communication mode with cultural context.

Suggesting information is mostly about the context or person only partly touches the idea and misses the unspoken core.

High context societies lean on nuance, hierarchy and long standing relationships.