Meaning of constant

con•stant

1. not changing or varying; uniform; regular; invariable: All conditions during the three experiments were constant.
2. continuing without pause or letup; unceasing: constant noise.
3. regularly recurrent; continual; persistent: He found it impossible to work with constant interruption.
4. faithful; unswerving in love, devotion, etc.: a constant lover.
5. steadfast; firm in mind or purpose; resolute.
6. certain; confident.

1. something that does not or cannot change or vary.
2. a number expressing a property, quantity, or relation that remains unchanged under specified conditions.
3. a quantity assumed to be unchanged throughout a given discussion.

Con•stant

1. See
2. 1845–1902, French painter.