1) Upper-Case Letter NounCapital, Capital Letter, Majuscule, Uppercase
One of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis.
Printers once kept the type for capitals and for small letters in separate cases; capitals were kept in the upper half of the type case and so became known as upper-case letters.
Unfaithful - not true to duty or obligation or promises; "He is not unfaithful".
Cell, Cellphone, Cellular Phone, Cellular Telephone, Mobile Phone - a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver; "Put the mobile on charging".
It - Used of a nonhuman entity; "Isn`t it?".