ice

1 ice /ˈaɪs/ noun
plural ices
1 ice
/ˈaɪs/
noun
plural ices
Britannica Dictionary definition of ICE
1 
[noncount]
a  : frozen water
— see also dry ice
b  : a sheet of frozen water
— see also black ice, center ice
c  : cubes or pieces of ice
2 
a  [count, noncount] US : a frozen dessert of crushed ice sweetened with fruit juice
b  [count] British, old-fashioned : a serving of ice cream
3 
[noncount] US slang, old-fashioned : diamonds or jewelry

break the ice

informal
: to say or do something that helps people to relax and begin talking at a meeting, party, etc. — see also icebreaker 2

cut ice

informal
: to have importance to someone — usually + with — used in negative statements

on ice

1 
: on top of pieces of ice in order to be kept cool
2 
informal : in the state of being delayed for a time
3 
US, informal : in a condition that makes victory certain

on thin ice

: in a dangerous situation : in a situation that may cause you to get into trouble
2 ice /ˈaɪs/ verb
ices; iced; icing
2 ice
/ˈaɪs/
verb
ices; iced; icing
Britannica Dictionary definition of ICE
[+ object]
1 
: to make (something) cold with ice
2 
: to cover (something, such as a cake) with icing
3 
US, informal : to make winning or getting (something) certain
4 
ice hockey : to shoot (the puck) down the rink and beyond the opponent's goal
5 
US slang, old-fashioned : to kill or murder (someone)

ice over/up

[phrasal verb]
: to become covered with ice