Object is the thing upon which the action of a verb is done. More technically a substantive word, phrase, or clause, immediately dependent on, or ‘governed by’, a verb, as expressing, in the case of a verb of action, the person or thing to which the action is directed, or on which it is exerted; that which receives the action of the verb. So 'the man patted the dog', 'the woman was reading the book'. An indirect object of a verb denotes that which is indirectly affected by an action, but wihch is not the immediate product of it, as ‘Give him the book’, ‘Make me a sandwich’.