Jack
3 definitions

The wall outlet that your telephone plugs into. 

FK Reading Ease
89.5

FK Grade Level
Elementary School
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  • "Jack": any species of bony fishes in the family Carangidae (which also includes the pompanos). Jacks are cosmopolitan in warm and temperate marine waters, some even venturing into brackish and fresh water. As a group, they are swift and strong predators. Typical
    FK Reading Ease
    47.1

    FK Grade Level
    High School
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  • This definition has not yet been approved by a moderator.

    Indicates the jack number assigned by the telephone answering service bureaus to each client line that terminates in their switchboards.

    FK Reading Ease
    42.7

    FK Grade Level
    College
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