Both Uses of

pantomime
in
Great Expectations

I expressed in pantomime the greatest astonishment.
p. 313.3 *

pantomime = gestures and body movements (without words)

The second piece was the last new grand comic Christmas pantomime, in the first scene of which, it pained me to suspect that I detected Mr. Wopsle with red worsted legs under a highly magnified phosphoric countenance and a shock of red curtain-fringe for his hair, engaged in the manufacture of thunderbolts in a mine, and displaying great cowardice when his gigantic master came home (very hoarse) to dinner.†
p. 407.2

Definitions:

(1) (pantomime)
a performance or expression of something through gestures and body movements without words
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

More rarely, pantomime, especially if qualified as Christmas pantomime can reference a humorous form of British theatre; or an ancient Roman type of theatre or the non-speaking actor it featured. On rare occasions, you may see the expression pantomime horse that refers to a horse costume worn by two people.