Ubiquitous means literally everywhere, in context with the subject. The word also refers to a philosophical concept, and is similar to 'universal', in that form of usage. The word is a bit of an anachronism in common usage these days, but is still common enough in academic and literary usage. The word 'ubiquity', derived from ubiquitous, is sometimes used to describe the state of being everywhere, commonplace, or widespread.
Examples of Ubiquitous:
|I've seen him so many times today it's like he's ubiquitous.|
McDonalds is ubiquitous in the USA.
You could hardly call honest people in politics ubiquitous.
The sheer ubiquity of iPhones, and people using iPhone as a sort of reference to their conversations, is extraordinary.