The Electromagnetic Spectrum. The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes â the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.
Top definition. fathom. 1. a unit of mesuring distance that is 6 feet or about equal to the length of a grown man's outstreched arms. 2. to contemplate or think about with effort. 1.the shipwreck is about 10 fathoms down. 2.who but the almighty can fathom the depths of the abyss.
â¢ FAT (noun). The noun FAT has 3 senses: 1. a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides). 2. a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs. 3. excess bodily weight.