Meaning : (Yiddish) a big shot who knows it and acts that way. A boastful immoderate person.
Meaning : A person who knocks (as seeking to gain admittance).
Example :
Open the door and see who the knocker is.
Meaning : One who disparages or belittles the worth of something.
Synonyms : depreciator, detractor, disparager
Meaning : A device (usually metal and ornamental) attached by a hinge to a door.
Synonyms : doorknocker, rapper
Knocker ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Knocker ka matlab kya hota hai?