A more thorough explanation:

A warrant officer is a type of officer in the military. They hold a rank between that of a commissioned officer and a non-commissioned officer. They are often experts in a specific field and provide technical expertise to their unit.

For example, a warrant officer in the Army may be a helicopter pilot or a cyber security specialist. They have advanced training and experience in their field and are responsible for leading and training others in that area.

Another example of a warrant officer is the Sergeant-at-Arms in the Canadian House of Commons. They are responsible for maintaining order and security in the House of Commons and ensuring the safety of Members of Parliament.

These examples illustrate the definition of a warrant officer as someone who holds a specialized position of authority and expertise within their organization.