The Collaborative International Dictionary of English v.0.48:

Cairo \Cairo\ prop. n. (Geography)
   The capital city of Egypt. It is the largest city in Africa.
   Population (2000) = 7,010,000.

   Syn: El Qahira, Egyptian capital, capital of Egypt.
        [WordNet 1.5 +PJC] cairngorm

WordNet (r) 3.0 (2006):

Cairo
    n 1: a town at the southern tip of Illinois at the confluence of
         the Ohio and Mississippi Rivers
    2: the capital of Egypt and the largest city in Africa; a major
       port just to the south of the Nile delta; formerly the home
       of the Pharaohs [syn: Cairo, Al Qahira, El Qahira,
       Egyptian capital, capital of Egypt]

The Free On-line Dictionary of Computing (30 December 2018):

Windows NT 4
Cairo

    A version of Microsoft's Windows NT
   operating system, originally code named "Cairo".  It was
   supposed to ship in the first half of 1995.  Details are
   scarce, but it is intended to provide an object-oriented
   version of Windows.

   (1996-07-09)


U.S. Gazetteer Places (2000):

Cairo, NE -- U.S. village in Nebraska
   Population (2000):    790
   Housing Units (2000): 316
   Land area (2000):     0.538504 sq. miles (1.394720 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.538504 sq. miles (1.394720 sq. km)
   FIPS code:            07625
   Located within:       Nebraska (NE), FIPS 31
   Location:             41.000409 N, 98.608083 W
   ZIP Codes (1990):     68824
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, NE
    Cairo


U.S. Gazetteer Places (2000):

Cairo, NY -- U.S. Census Designated Place in New York
   Population (2000):    1390
   Housing Units (2000): 739
   Land area (2000):     4.249810 sq. miles (11.006958 sq. km)
   Water area (2000):    0.010399 sq. miles (0.026933 sq. km)
   Total area (2000):    4.260209 sq. miles (11.033891 sq. km)
   FIPS code:            11638
   Located within:       New York (NY), FIPS 36
   Location:             42.302637 N, 74.003818 W
   ZIP Codes (1990):     12413
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, NY
    Cairo


U.S. Gazetteer Places (2000):

Cairo, GA -- U.S. city in Georgia
   Population (2000):    9239
   Housing Units (2000): 3898
   Land area (2000):     9.313559 sq. miles (24.122007 sq. km)
   Water area (2000):    0.052289 sq. miles (0.135429 sq. km)
   Total area (2000):    9.365848 sq. miles (24.257436 sq. km)
   FIPS code:            12400
   Located within:       Georgia (GA), FIPS 13
   Location:             30.877803 N, 84.208877 W
   ZIP Codes (1990):     31728
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, GA
    Cairo


U.S. Gazetteer Places (2000):

Cairo, OH -- U.S. village in Ohio
   Population (2000):    499
   Housing Units (2000): 184
   Land area (2000):     0.241764 sq. miles (0.626166 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.241764 sq. miles (0.626166 sq. km)
   FIPS code:            10884
   Located within:       Ohio (OH), FIPS 39
   Location:             40.831355 N, 84.084501 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, OH
    Cairo


U.S. Gazetteer Places (2000):

Cairo, IL -- U.S. city in Illinois
   Population (2000):    3632
   Housing Units (2000): 1885
   Land area (2000):     7.051326 sq. miles (18.262849 sq. km)
   Water area (2000):    2.080908 sq. miles (5.389528 sq. km)
   Total area (2000):    9.132234 sq. miles (23.652377 sq. km)
   FIPS code:            10383
   Located within:       Illinois (IL), FIPS 17
   Location:             37.013144 N, 89.180345 W
   ZIP Codes (1990):     62914
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, IL
    Cairo


U.S. Gazetteer Places (2000):

Cairo, WV -- U.S. town in West Virginia
   Population (2000):    263
   Housing Units (2000): 140
   Land area (2000):     0.490493 sq. miles (1.270372 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.490493 sq. miles (1.270372 sq. km)
   FIPS code:            12124
   Located within:       West Virginia (WV), FIPS 54
   Location:             39.208264 N, 81.156600 W
   ZIP Codes (1990):     26337
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, WV
    Cairo


U.S. Gazetteer Places (2000):

Cairo, MO -- U.S. village in Missouri
   Population (2000):    293
   Housing Units (2000): 127
   Land area (2000):     0.268029 sq. miles (0.694193 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.268029 sq. miles (0.694193 sq. km)
   FIPS code:            10360
   Located within:       Missouri (MO), FIPS 29
   Location:             39.512027 N, 92.440887 W
   ZIP Codes (1990):     65239
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Cairo, MO
    Cairo