Full Idea
Whatever may be an object of thought, or occur in a true or false proposition, or be counted as one, I call a term. This is the widest word in the philosophical vocabulary, which I use synonymously with unit, individual, entity (being one, and existing).
Gist of Idea
I call an object of thought a 'term'. This is a wide concept implying unity and existence.
Source
Bertrand Russell (The Principles of Mathematics [1903], §047)
Book Reference
Russell,Bertrand: 'Principles of Mathematics' [Routledge 1992], p.43
A Reaction
The claim of existence begs many questions, such as whether the non-existence of the Loch Ness Monster is an 'object' of thought.