Musk, the world's richest man, finalised a deal on Monday to buy Twitter  for $44 billion sticking to his offer of $54.20 per share.

A day after Twitter takeover deal was confirmed, the billionaire tech entrepreneur explained what he meant by "free speech".

Musk said that free speech must match the law and that he is against censorship that goes far beyond the law.

After his Twitter takeover deal, Elon Musk targeted  his critics saying, "The extreme antibody reaction from those who fear  free speech says it all."

The Tesla chief also targeted his critics in a cryptic tweet saying,  "The extreme antibody reaction from those who fear free speech says it  all."

"By 'free speech', I simply mean that which matches the law. I am against censorship that goes far beyond the law".Musk said in a tweet Tuesday.

Musk claims to be a "free speech absolutist".He also said he wanted even his "worst critics" to stay on the microblogging platform.

The reports of the deal hit the share market, plummeting Tesla shares by over 12 per cent.