Weight was the mass of a person or object. It could be affected by gravity.
Weight of individuals Edit
As of 2370, Data weighed 100 kilograms. (TNG: "Inheritance") Of that weight, 26.8 kilos was of tripolymer composites, 11.8 kilos was of molybdenum-cobalt alloy, and 1.3 kilos was Bioplast sheeting. (TNG: "The Most Toys")
Weight of objects Edit
In 2378, B'Elanna Torres played The Doctor's holonovel entitled Photons Be Free, in the role of an Emergency medical technician. Her character's mobile emitter was much heavier and bulkier than the one in reality and she speculated it must have weighed fifty kilos. When she asked the Doctor about it, he said that its weight served as a metaphor for the burden of being a hologram. (VOY: "Author, Author")