When readers or hearers interpret a definite associative NP, they must take
into account that all definite NPs carry a presupposition of existential u
niqueness. This implies that hearers or readers can access an entity which
is presented as the only one of the type expressed by the N of the definite
NP. In the case of associative definites which introduce a new entity, thi
s entity must be easily accessible through, for instance, a definite NP1, S
tereotypical part-whole relations are a case in point where such accessibil
ity exists between the entities designated by NP1 and NP2. The fact that a
definite associative NP2 must be supported by an accessibility relation exp
lains why the use of a definite associative NP2 comes across as strange, sh
ould a part-whole relation be transitive. Problems also arise when the hear
er or reader has no previous knowledge about the links between the entities
denoted by the definite NP2 and the preceding NP1. In this case the contex
t may offer several candidates for the role of antecedent and favor a coref
erential or associative interpretation. The last part of the paper is devot
ed to a discussion of examples of this type of context and argues in favour
of an approach to associative anaphora that takes into account diverse, an
d possibly contradictory, contextual clues in the utterance where NP1 is em
ployed. (C) 1999 Elsevier Science B.V. All rights reserved.