Opinions on the meaning of the acronym range widely. Kay-Tow', like the Green Hornet's side kick. It has been pointed out, though, that all of the above are 'post-hoc' definitions since LCO's were using the term over range PA systems long before any formal acronym was established. To be precise, consumer rocket motors do NOT 'detonate'. Black powder rocket motors 'deflagrate'.
Detonation involves the creation of super- sonic shock waves.
Use the term 'explode' when discussing CATOs involving split motor casings, holes blown out the sides of models, etc. This subject has been hotly debated on r.m.r. It is one of those 'emotional' subjects that find people either firmly for or against. Some amateur issues are discussed, but these are not the primary focus of the group. Manufacturing your own rocket motors can be a very dangerous thing to do, unless done properly, and with extreme care.