hiddenproject
nounUK /ˈhɪdən ˈprɒdʒɛkt/
US /ˈhɪdən ˈprɑːdʒɛkt/
A hidden project is a secret piece of work that people keep quiet.
The kids made a hidden project in the basement to surprise their mom.
OTHER MEANINGS
2. A computer file or folder that is not shown in the normal view.
The hidden project folder only appears when you turn on show hidden files.
3. A special assignment kept off the public list at school or work.
Her hidden project for the science fair won a prize.
4. A surprise activity planned for someone without telling them.
The class kept their hidden project a secret until the party.