situated on or toward the outside; external; exterior

outer garments; an outer wall.

situated farther out or farther from the center

the outer reaches of space.

of or pertaining to the external world.

adjective

central , inner , interior

adjective

alien , beyond , exoteric , exterior , extraneous , extrinsic , outermost , outlying , outmost , outside , outward , over , peripheral , remote , superficial , surface , without , ectal , exposed , external , foreign , space