The Speed of Light and How to Define speed? by Sherif S. Monem sherifsmonem

In physics when it is hard to define a subject you try to define it in terms of other undefined subjects and this what makes science great. Such a case is to how to seek and define speed of light? In order to define the speed of light one needs to define what is the distance? and what is the time in absolute sense? I our daily life and on planet earth measuring distance and time we can measure these two terms in close absolute certainty but this is not the case in cosmos and in between planets in the solar system and in between the stars.