Welted definition, a ridge or wale on the surface of the body, as from a blow of a stick or whip. See more.
AM stands for âante meridiemâ, which means âbefore noonâ in Latin, while PM stands for âpost meridiemâ, which means âafter noonâ in Latin. 12-Hour Periods. Most clocks today are 12-hour clocks â they divide the 24 hours in a day into two 12-hour periods.
AM* and PM* Abbreviation(s), Latin phrase, Meaning. 1  Terms 12 a.m. and 12 p.m. cause confusion and should not be used as neither the 12 am nor the 12 pm designation is technically correct.  It advisable to use 12 noon and 12 midnight where clarity is required.