Merriam Webster defines intellectual freedom as: freedom that allows people to think about or study what they want.
Encyclopedia of Diversity and Social Justice provides this definition:
Intellectual freedom means having the liberty to seek and express knowledge. Instead of waiting for the permission of others for intellectual advancement, one openly reads, writes, and thinks without reservation or apology.
Merriam Webster defines academic freedom as: freedom to teach or to learn without interference (as by government officials)
American Civil Liberties Union (ACLU) : Censorship, the suppression of words, images, or ideas that are “offensive,” happens whenever some people succeed in imposing their personal political or moral values on others. Censorship can be carried out by the government as well as private pressure groups. Censorship by the government is unconstitutional.
Book banning occurs when individuals or organizations attempt to ban books or limit their availability. This has been an issue primarily in public and school libraries, and efforts to ban books continue throughout the United States.