Definitionen
1.AdjectiveHaving traits or characteristics in common; alike, allied, comparable."My new car is quite similar to my old one, except it has a bit more space in the back."
2.AdjectiveHaving the same shape, in particular, having corresponding angles equal and corresponding line segments proportional.
3.AdjectiveOf two square matrices; being such that a conjugation sends one matrix to the other.
4.NounThat which is similar to, or resembles, something else, as in quality, form, etc.
5.NounA material that produces an effect that resembles the symptoms of a particular disease.