The paper constitutes an attempt to provide a nonenumerative characterization of agreeing terms and agreement features. The following pertinent statements turn out to be (near) exceptionless: only coreferential terms agree, and for any given language all agreement features are pronominal ones. Four agreement features, gender, number, definiteness, person, are discussed in more detail. For gender and number, a distinction between noun-phrase-internal and noun-phrase-external agreement is made, and the generalization is suggested that if agreement takes place in terms of "semantic" rather than "grammatical" gender or number within the noun phrase, then noun-phrase-external agreement is also "semantic." Some informal suggestions are made about how various language (-type)-specific agreement phenomena can be accounted for in terms of assumptions about universal underlying structure. (Author)