upper-case letter

1. Identifiers cannot contain two consecutive underscores, nor can an identifier begin with an underscore followed immediately by an upper-case letter.
   标识符不能包含两个连续的下划线，也不能以下划线开头后面紧跟一个大写字母。
2. Having the form of an upper-case letter but the same height as lower-case letters.
   大写字母的形状小写字母的高度的字符。

noun

1. one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis
   1. printers once kept the type for capitals and for small letters in separate case

   Synonym:    capitalcapital letteruppercasemajuscule