(music) The position when the thumb is contacting the string or strings of a stringed instrument.

(physics) A feedback loop in which the output of a system is amplified with a net positive gain and added to the input signal before the main amplifier.

A position in which a person sits upright in a bed, possibly bending forward.

(bacteriology, of a bacterium) That stains dark blue or violet after Gram staining, due to large quantities of peptidoglycan in the cell wall.

plural of position paper

plural of positive side waterproofing

Capable of being positioned.

Indicates that the speaker is a carrier of the human immunodeficiency virus.

plural of positionality

The quality of being positional.