What is the meaning of Spook?

A ghost or phantom.

A hobgoblin. (Can we verify this sense?)

A scare or fright.

An undercover agent or spy.

A black person.

A metaphysical manifestation; an artificial distinction or construct.

A psychiatrist.

A player who engages in hole carding by attempting to glimpse the dealer's hole card when the dealer checks under an ace or a 10 to see if a blackjack is present.

To frighten or make nervous (especially by startling).

To become frightened (by something startling).

To haunt.

ghost, phantom

phantom, ghost

spectre, horror, terror

an imaginary horror, conceptual nightmare

an annoying and intolerable woman

inflection of spoken:

  1. first-person singular present indicative
  2. (in case of inversion) second-person singular present indicative
  3. imperative

first-person singular present indicative

(in case of inversion) second-person singular present indicative

imperative

Alternative form of spoke

Source: wiktionary.org