What does genuflect?

Answer 1

To kneel on one knee and then rise as an act of respect.

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Catholic AnswerA genuflection is an act of Adoration to the Blessed Sacrament, and an act of respect to a prelate of the Catholic Church. One lowers one knee to the ground, touch the ground with that knee, and then arise.

from Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980Genuflection. Bending of the knee as an act of reverence. Customary when passing before the Blessed Sacrament in the tabernacle, entering the pew for divine worship, and during certain ceremonies to the Cross. A double genuflection of both knees simultaneously was commonly made before the Blessed Sacrament exposed in a monstrance. The new directive since the Second Vatican Council specifies: "One knee is bent before the Blessed Sacrament, whether reserved in the tabernacle or exposed for public adoration" (Eucharistiae Sacramentum, 1973, number 84). Genuflections are also made to the Pope, to a cardinal, and to a bishop in his own diocese.

Note: Genuflection to the Blessed Sacrament is made on the right knee, genuflection to a prelate is made on the left knee.