Sybil Wolfram writes
Particulars include only individuals of a certain kind: as a first approximation individuals with a definite place in space and time, such as persons and material objects or events, or which must be identified through such individuals, like smiles or thoughts.The fact of the matter is that all such terms are used by philosophers with a rough-and-ready idea of how they work. If there is confusion or lack of agreement about the specifics, that is a reflection of the fact that philosophers have many competing metaphysical theories that inform more precise, but idiosyncratic, accounts of the meanings of these terms. Hence, for example, for convenience in formulating a solution to the problem of universals, 'particular' can be pressed into service in describing the particular instance of redness of a particular apple--even though redness (being abstract) is precisely the sort of thing that is not supposed to be particular. See philosophical jargon.
Law Report: Court Had Discretion to Extend Time for Service of Particulars of Claim ; 10 October 2001 Totty V Snowden; Hewitt V Wirral and West Cheshire Community NHS Trust Court of Appeal, Civil Division (Lord Justice Peter Gibson, Lord Justice Chadwick and Lord Justice Kay) 31 July 2001
Oct 10, 2001; THE COURT had discretion to grant an extension of time to a claimant who had served a claim form within the time prescribed by...