To sit facing a wall; often refers to the Buddhist practice of meditation or to being sent to a corner as a punishment.

To devote oneself entirely to study, work, or a difficult pursuit.

To pay no attention to someone or something; to give the cold shoulder.

(Buddhism) To sit facing a wall in silent meditation, as attributed to Bodhidharma

To appear to have nothing to do; to be in a state of idleness

To achieve a high level of proficiency or attainment, especially through long-term dedicated practice