A property available for sale, but not publicly advertised or widely promoted.

an indication that a property is selling, or was sold, without any public advertising.

plural of marker horizon

(geochronology) A stratigraphic unit of distinctive lithology with a wide geographical extent used in stratigraphic correlation.

plural of non-manual marker

(American Sign Language) Any of the non-sign components of American Sign Language (facial expression, body position, head position, etc.) that provide context and tone to signs.