Other
- Clifford the Big Red Dog, a children's book and a TV-series based on it
- Clifford (character), the central character of Clifford the Big Red Dog
- Clifford's Puppy Days, an animated television show, featuring Clifford the Big Red Dog
- Clifford (Muppet), a character on The Muppets
- Clifford (film), a 1994 film starring Martin Short and Charles Grodin
- Clifford algebra, a type of associative algebra, named after William Kingdon Clifford
- Clifford analysis, a mathematical study of Dirac operators
- Clifford Chance, an international attorney firm, headquartered in London, England
- Clifford House (Eustis, Florida), a historic house in the US state of Florida
- Clifford International School, an international school in Guangzhou, People's Republic of China
- Clifford module, a mathematical representation
- Clifford Pier, a pier in Singaport
- Clifford theory, dealing with representations, named after Alfred H. Clifford
- Clifford torus, a figure in geometric topology
- Clifford's Inn, a London (England) Inn of Chancery
- Clifford's theorem, any of several mathematical derivations
- Clifford's Tower, the previously-used name of York Castle in England
- Clifford-Warren House, a historic house in the US state of Massachusetts
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