The breadth, depth or reach of a subject; a domain.

(weaponry) A device used in aiming a projectile, through which the person aiming looks at the intended target.

Opportunity; broad range; degree of freedom.

(programming) The region of program source code in which a given identifier is meaningful, or a given object can be accessed.

(logic) The shortest sub-wff of which a given instance of a logical connective is a part.

(linguistics) The region of an utterance to which some modifying element applies.

(slang) A periscope, telescope, microscope or oscilloscope.

(medicine, colloquial) Any medical procedure that ends in the suffix -scopy, such as endoscopy, colonoscopy, bronchoscopy, etc.

(informal, transitive) To perform a cursory investigation of; scope out.

(medicine, colloquial) To perform any medical procedure that ends in the suffix -scopy, such as endoscopy, colonoscopy, bronchoscopy, etc.

To define the scope of something.

(programming) To limit (an object or variable) to a certain region of program source code.

(informal) To examine under a microscope.

(birdwatching, informal) To observe a bird using a spotting scope.