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idea

1 ENTRIES FOUND:
idea /aɪˈdiːjə/ noun
plural ideas
idea
/aɪˈdiːjə/
noun
plural ideas
Britannica Dictionary definition of IDEA
[count] : a thought, plan, or suggestion about what to do
[count] : an opinion or belief
: something that you imagine or picture in your mind
[count]
[noncount]
[singular] : an understanding of something : knowledge about something
the idea : the central meaning or purpose of something

give someone ideas

or put ideas in/into someone's head
: to cause someone to think about doing something that probably should not be done