levels Definition

a device for establishing a horizontal line or plane by means of a bubble in a liquid that shows adjustment to the horizontal by movement to the center of a slightly bowed glass tube

a measurement of the difference of altitude of two points by means of a level

horizontal condition; especially : equilibrium of a fluid marked by a horizontal surface of even altitude

to make (a line or surface) horizontal : make flat or level

to bring to a horizontal aiming position

aim, direct

a level

the second of three standardized British examinations in a secondary school subject used as a qualification for university entrance; also : successful completion of an A-level examination in a particular subject —called also Advanced level

the level of education required to pass an A-level examination

a course leading to an A-level examination

a bi-level house

a surveyor's level with a short telescope rigidly fixed and rotating only in a horizontal plane

one of the stable states of constant energy that may be assumed by a physical system —used especially of the quantum states of electrons in atoms and of nuclei—called also energy state

to approach or reach a steady rate, volume, or amount : stabilize

the probability of rejecting the null hypothesis in a statistical test when it is true —called also significance level

the lowest of three levels of standardized British examinations in a secondary school subject; also : successful completion of an O-level examination in a particular subject —called also Ordinary level

the level of education required to pass an O-level examination

a course leading to an O-level examination