Weight
Weight was the mass of an individual or object. It could be affected by gravity.

Weight of individuals 

Those whose weights exceeded normal measurements were said to be overweight. (; )

As of 2266, Harry Mudd weighed 240 pounds. ()

As of 2370, Data weighed 100 kilograms. () 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. ()

Kor felt insecure about how heavy he was because he was lighter when he had last seen Dax. ()

When the crew of the  was trapped in , Kathryn Janeway wondered if they would lose weight due to malnutrition. ()

In 2382, Lars Lundy correctly guessed Brad Boimler's weight of "a healthy 61.2 kilos," explaining that, his figure drawing class needed a skeletal boy for their life drawing, before inquiring if he had "ever sat for oil?" ()

Weight of objects 
In 2370, when Jadzia Dax requested a bat'leth from the holosuite, she specified it to weigh five point three kilos. () 

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. ()

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Measurements
Physiology
Medicine
Physics