The difference between Circuit and Lu

Circuit as a noun:

The act of moving or revolving around, or as in a circle or orbit; a revolution

Circuit as a noun:

The circumference of, or distance around, any space; the measure of a line around an area.

Circuit as a noun:

That which encircles anything, as a ring or crown.

Circuit as a noun:

The space enclosed within a circle, or within limits.

Circuit as a noun (electricity):

Enclosed path of an electric current, usually designed for a certain function.

Circuit as a noun:

A regular or appointed trip from place to place as part of one's job

Circuit as a noun (legal):

The jurisdiction of certain judges within a state or country, whether itinerant or not.

Circuit as a noun (historical):

Various administrative divisions of imperial and early Republican China, including: The counties at the fringes of the empire, usually with a non-Chinese population, from the Han to the Western Jin. The 10 or so major provinces of the empire from the Tang to the early Yuan. Major provincial divisions from the Yuan to early Republican China.

Circuit as a noun (legal):

Circuit as a noun (Methodist Church):

A district in which an itinerant preacher labors.

Circuit as a noun:

By analogy to the proceeding three, a set of theaters among which the same acts circulate; especially common in the heyday of vaudeville.

Circuit as a noun (motor racing):

A track on which a race in held.

Circuit as a noun (obsolete):

circumlocution

Circuit as a noun (Scientology):

A thought that unconsciously goes round and round in a person's mind and controls that person.

Circuit as a verb (intransitive, obsolete):

To move in a circle; to go round; to circulate.

Circuit as a verb (transitive, obsolete):

To travel around.

Lu as a noun:

(card game)

Lu as a verb:

(beat at card game)

Lu as a noun (historical):

or circuit: an administrative division of imperial China.