Pedestrian
Part of speech: adjective
Definition: Of or intended for those who are walking. Ordinary, dull; everyday; unexceptional.
Part of speech: noun
Definition: Somebody walking rather than using a vehicle; somebody traveling on foot.
Example sentence: At the risk of sounding pedestrian, I'll be completely honest: the first thing I do in the morning is check Google News, partially because it seems sort of random and unbiased and partially because I tend to stay in hotels that don't necessarily have the fastest Internet connections.
Earthbound
Part of speech: adjective
Definition: confined to the Earthunimaginative or mundaneheading towards Earth