Observatory Ob*serv"a*to*ry, n.; pl. {Observatories}. [Cf. F. observatoire.] 1. A place or building for making observations on the heavenly bodies. [1913 Webster]

The new observatory in Greenwich Park. --Evelyn. [1913 Webster]

2. A building fitted with instruments for making systematic observations of any particular class or series of natural phenomena. [1913 Webster]

3. A place, as an elevated chamber, from which a view may be observed or commanded. [1913 Webster]

4. (Mil.) A lookout on a flank of a battery whence an officer can note the range and effect of the fire; usually referred to as an {observation post}. --Farrow. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

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