The word object has two main meanings:

1. A physical thing you can see or touch. Your backpack is an object, and so is a pencil, a baseball, or a book. When detectives search a crime scene, they look for objects that might be clues: a button, a receipt, a shoe. Scientists studying ancient civilizations get excited when they find objects like pottery or tools because these items reveal how people lived. The word suggests something concrete and definite, not vague or imaginary.
2. To disagree with something or express opposition. When you object to an unfair rule in a game, you speak up about why you think it's wrong. A lawyer might object during a trial when the other side asks an inappropriate question. If your parents suggest cleaning the garage on Saturday and you object because you have soccer practice, you're presenting a reason why their plan won't work.

An objection is the statement you make when you object. If you have no objection to something, it means you're fine with it. You can object to the timing of a family trip, object to how teams were chosen, or object to a verdict you think is unjust.