노인old person; the aged; senior citizen 경로석gyeongnoseok; seat for the elderly 노약자elderly or infirm people 노약자석seat for the elderly and infirm 초로early old age 촌로village senior 해로married couple growing old together 경로respect for the aged 경로당senior citizen center 경로사상gyeongnosasang; respect for the elderly

연령age 연령대age group 연령별by age 최고령the oldest 학령school age 학령기compulsary school age 고령old age; advanced age 고령자the aged; a senior citizen; an aged person 고령화aging 노령old age

층layer 각층all levels; all walks of life 계층class 고층upper floors 단층being one-storied 저층lower floors 청년층youth 초고층skyscraper 최상층top floor; top layer 최하층bottom floor; the lowest floor