Earthbound in a sentence as an adjective

Only if you assume that evolution hasn't affected earthbound diatoms in any way.

Ship the power down the space elevator and you have cheap renewable energy without the downsides of it being earthbound.

It merely has a reflector that bounces earthbound researcher-gnereated laser photons back.

Earthbound definitions

adjective

confined to the earth

adjective

lacking wit or imagination; "a pedestrian movie plot"

See also: pedestrian prosaic prosy