deconstruction of a word

The process of deconstruction is when you extract the meaning of a word and then you give it a different meaning. For example the word gentleman it has been very changed, before that word use to mean a man who take good care of a woman and he treated she very well like a princes, open doors, giving make she comfortable etc. but now if you do that kind of stuffs here then people call you “mandarina”. So is a deconstructed word that now a days it have like another meaning than before. thats what i think.