A word, according to the Oxford Dictionaries, is a single distinct meaningful element of speech or writing, used with others (or sometimes alone) to form a sentence and typically shown with a space on either side when written or printed.
"The implementation of the Goals must be underpinned by a strong and active civil society that includes the weak and the marginalized. We must defend civil society's freedom to operate and do this essential job. On this International Day of Democracy, let us rededicate ourselves to democracy and dignity for all." — UN Secretary-General, Ban Ki-moon
"Trade liberty for safety or money and you'll end up with neither. Liberty, like a grain of salt, easily dissolves. The power of questioning - not simply believing - has no friends. Yet liberty depends on it."