A tree of the species Acer rubrum

(Canada, US, slang) A promiscuous man.

(archaic, politics) Qing Empire/Empire of China/China

(archaic, politics) Qing Empire / Empire of China / China

Used other than figuratively or idiomatically: see young, man. / A term of endearment or address by adults for a young boy. / (dated) A male lover; a sweetheart.

(archaic, politics) Ottoman Empire. / (politics) Any European country undergoing economic difficulty.

mail carried by dogsled.

Mail carried on zeppelins.

mail (usually for weight reasons in the form of a postcard) carrying the name of the sender by means of an unguided hydrogen- or helium-filled balloon.

mail delivered by bicycle and identified by stamp and/or postal mark.