Question

What does it mean by "the mass of an object is 5kg"?​

Answer 1

Answer:

That the object contains 5 kg of mass.

Answer 2

Answer:

Answer_verified_by_topper

5 kg object has a mass of 5 kg.

The weight you associate with it is only relevant on Earth (under its specific gravity) and in fact really the kilogram-force measurement which is

measured in Newtons (5 kg x 9.8 m/s 2 = 49.2 N).

Commonly, it means the object weighs 5 kg.