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dream

1 dream /ˈdriːm/ noun
plural dreams
1 dream
/ˈdriːm/
noun
plural dreams
Britannica Dictionary definition of DREAM
[count] : a series of thoughts, visions, or feelings that happen during sleep
see also wet dream
[count] : an idea or vision that is created in your imagination and that is not real
[count] : something that you have wanted very much to do, be, or have for a long time
see also american dream, pipe dream
[singular] : someone or something that has the qualities that a person wants most
usually used before another noun
see also dream team
[singular] informal : something that is beautiful, excellent, or pleasing
[singular] : a state or condition in which you are not thinking about or aware of the real things that are around you

in your dreams

informal
used to say that you do not think something that another person wants or expects will ever happen
2 dream /ˈdriːm/ verb
dreams; dreamed /ˈdrɛmt/ /ˈdriːmd/ or dreamt /ˈdrɛmt/ ; dreaming
2 dream
/ˈdriːm/
verb
dreams; dreamed /ˈdrɛmt/ /ˈdriːmd/ or dreamt /ˈdrɛmt/ ; dreaming
Britannica Dictionary definition of DREAM
: to have visions and thoughts in your sleep : to have a dream while you are sleeping
[no object]
often + of or about
[+ object]
: to think about something that you wish would happen or something that you want to do or be
[no object]
often + of
[+ object]

dream on

informal
used to say that you do not think something that another person wants or expects will ever happen

dream up

[phrasal verb]
dream up (something) also dream (something) up
: to think of or invent (something) in your mind

never/not dream of

used to say that you would never do something or think of doing something