40th

40th is the ordinal form of the number 40. 40th or Fortieth may also refer to:

• A fraction, 1⁄40, equal to one of 40 equal parts

Geography

• 40th meridian east, a line of longitude
• 40th meridian west, a line of longitude
• 40th parallel north, a circle of latitude
• 40th parallel south, a circle of latitude
• 40th Street (disambiguation)

Military

• 40th Battalion (disambiguation)
• 40th Brigade (disambiguation)
• 40th Division (disambiguation)
• 40th Regiment (disambiguation)
• 40th Squadron (disambiguation)

Other

• 40th century
• 40th century BC

See also

• 40 (disambiguation)
• The Fortieth Door, 1924 American adventure film serial