1. a coined word, meaning matter, energy, space and time, the physical universe. All physical phenomena may be considered as energy operating in space and time. The movement of matter or energy in time is the measure of space. All things are mest except theta. (Abil 114-A) 2. the symbol for the physical universe in use hereafter is mest, from the first letters of the words matter, energy, space and time, or the Greek letter phi (ø). (HFP, p. 166) 3. simply a composite of energies and particles and spaces which are agreed upon and which are looked at. (PXL, p. 193) 4. a solid object, and the space and energy and so forth which comprise such solid objects. (PDC 12) 5. any or all arrangements of energy, of whatever kind, whether in fluid or object form, in space or spaces. (Dn 55!, p. 9)