In the current version of the second definition, racism is "a doctrine or political program based on the assumption of racism and designed to execute its principles," and "a political or social system founded on racism." "This is the kind of continuous revision that is part of the work of keeping the dictionary up to date, based on rigorous criteria and research we employ in order to describe the language as it is actually used," he said.
One of the dictionary's editors told Ms Mitchum that the definitions of other words "related to racism or have racial connotations" would also be updated, without specifying which ones. "We apologise for the harm and offense we have caused in failing to address this issue sooner," the editor wrote, according to a message published by Drake University and retweeted by Ms Mitchum.