Noun
one face; one surface
彼は新聞を取り上げて何気なく1面を眺めた。He picked up the newspaper and glanced casually over the front page. the whole surface
one aspect; one side
Noun, Adverb (fukushi)
(on) the other hand
Noun
one broad, flat object
front page (e.g. newspaper)
Also written 1面【いちめん】