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shock

1 shock /ˈʃɑːk/ noun
plural shocks
1 shock
/ˈʃɑːk/
noun
plural shocks
Britannica Dictionary definition of SHOCK
[count] : a sudden usually unpleasant or upsetting feeling caused by something unexpected usually singular
often + of
see also culture shock, sticker shock
[count] : something unexpected that causes a sudden usually unpleasant or upsetting feeling usually singular
[noncount] : a state in which you are experiencing a sudden usually unpleasant or upsetting feeling because of something unexpected
[count] : a sudden bad change in something
[noncount] medical : a serious condition in which the body is not able to get enough blood to all the parts of the body
◊ Shock is caused by a severe injury, a large loss of blood, etc.
see also shell shock, toxic shock syndrome
[count] : the effect of a strong charge of electricity passing through the body of a person or animal usually singular
: a violent shake
[count]
often + of
[noncount]

a shock to the/your system

: something that has a sudden and usually unpleasant effect on you
compare 4shock
2 shock /ˈʃɑːk/ verb
shocks; shocked; shocking
2 shock
/ˈʃɑːk/
verb
shocks; shocked; shocking
Britannica Dictionary definition of SHOCK
[+ object] : to surprise and usually upset (someone)
often used as (be) shocked
often + at or by
often + into
: to cause (someone) to feel horror or disgust
[+ object]
[no object]

— shocked

adjective
3 shock /ˈʃɑːk/ adjective
3 shock
/ˈʃɑːk/
adjective
Britannica Dictionary definition of SHOCK
always used before a noun
used to describe something that surprises and usually upsets people

shock horror

British, informal
used to say that you are surprised by something unpleasant or upsetting when you really are not
4 shock /ˈʃɑːk/ noun
plural shocks
4 shock
/ˈʃɑːk/
noun
plural shocks
Britannica Dictionary definition of SHOCK
[count]
: a thick and full mass of hair usually singular
compare 1shock