A declination can also be a polite refusal, especially in a formal or official situation. In this sense, it is a noun form of the verb decline, meaning to refuse or to turn something down. In most cases, it's much more common for people to use words like deterioration, decline, deviation, and refusal than declination.

Is declination the same as decline?

As nouns the difference between declination and decline

is that declination is at a given point, the angle between magnetic north and true north while decline is downward movement, fall.

What is the meaning of the declination?

1 : angular distance north or south from the celestial equator measured along a great circle passing through the celestial poles. 2 : a turning aside or swerving. 3 : deterioration moral declination. 4 : a bending downward : inclination.