Is hummus a condiment
Interesting question.  While I realize that dictionaries are descriptive, they're what we have to go by for common usage, so let's consult three:


Wikipedia: A condiment is a spice, sauce, or preparation that is added to food to impart a particular flavor, to enhance its flavor,1 or in some cultures, to complement the dish. The term originally described pickled or preserved foods, but has shifted meaning over time.
Merriam-Webster: something used to enhance the flavor of food; especially : a pungent seasoning 
Cambridge: a substance, such as salt, that you add to food to improve its taste


Given that Hummus is usually treated as a food in itself, rather than as a spice or sauce to enhance another food, one could argue that it's not a condiment.  However, it's not uncommon for veggie burger purveyors to top a sandwich with hummus, which would, in usage, make it a condiment.  Certainly tahini sauce would be a condiment.

So, my answer: It Depends.