Meanings

long socks

longbow

police sergeant

chief (of police)

head of a branch

long blast of a ship's horn

long take (film-making)

record length

long-range forecast (usu. weather)

young CEO

Long Day's Journey into Night (play by Eugene O'Neill)

Secretary-General of the United Nations

school principal

gerontocracy

long-term use (e.g. of a drug)

long-life quality housing

B flat major

D major

long shoot

long-vowel mark