(television) A system that uses a resolution that is not considered to be either high-definition television (720p, 1080i, 1080p, 1440p, 4K UHDTV, and 8K UHD) or enhanced-definition television (EDTV 480p).

(US, law) A legal defense in which the defendant claims to have committed a crime in the belief that he/she was not in the real world, but in a simulated reality.

(geometry, non-Euclidean geometry) The amount by which the total of the interior angles of a triangle is less than 180° (π radians); the amount by which the total of the internal angles of a polygon is less than what would be expected on the Euclidean plane.

(surveying) A measure of how far the direction of the local gravity field has been shifted at a certain point on the Earth by local anomalies such as nearby mountains.

(law) An attorney appointed to represent people who cannot afford to hire one.

(academy) The final step in earning a doctorate: an oral examination in which the doctorand publicly defends his/her thesis to the examiners.

Alternative form of Two Knights' Defence

Alternative form of Two Knights' Defence

Alternative form of Two Knights' Defence

A common chess opening, characterized by the moves 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6, in which black brings out both knights.