It means something is blown out of proportion or something's really incorrect.
"Your paper looks ridiculous because you wrote microscopic!"
It was ridiculous that my brother has 6 toes.
concordance is such a weird word it's ridiculous
He killed the man with such barbarity, it was ridiculous.
Daft means to be silly or foolish and ridiculous. A good sentence would be, she started asking very daft questions to the teacher.
It's a ridiculous hair cut and he wants a refund.It's a ridiculous argument and no one will win.Her story is ridiculous and I don't believe it.It's a ridiculous price but he bought it anyway.
Pigs don't fly, that is absolutely ridiculous."Absolutely, you can count on me!"
You just did use the word colonize in a sentence.
Since that is not a word I would not attempt to use it in a sentence.
that was just outright ridiculous.
Your ridiculous explanation leaves me unvexed.
how would you use the word finished in a command sentence
1. you did just use that word in a sentence 2. if a doctor would use the word tumor in a sentence they would probably say "we need to remove the tumor from this persons body."