(anatomy) The sphincter situated at the lower part of the esophagus.

(idiomatic) To use one's superior physical strength. / (idiomatic, with "on") To scold severely.

plural of lowbrow

dark and gloomy; threatening; lowering

(US, military, nautical) A commissioned officer in the United States Navy, Coast Guard, NOAA Corps, or PHS Corps of a grade superior to a captain and junior to a rear admiral (upper half). A rear admiral (lower half) is equal in grade or rank to an Army, Marine Corps, or Air Force brigadier general.

(anatomy) The part of the respiratory tract consisting of trachea, bronchi, bronchioles and alveoli.

(anatomy) The part of the respiratory tract starting at the trachea and ending at the bronchioles. / (anatomy) The part of the respiratory tract starting at the trachea and ending at alveoli.

(government) The lower legislative house in a bicameral legislature; in many cases, the one that is directly elected and/or has more practical power, such as the power to raise and spend money.

(government) The lower legislative chamber in a bicameral legislature; in many cases, the one that is directly elected and/or has more practical power, such as the power to raise and spend money.

plural of lowbush blueberry