Wordnet 3.0
NOUN (1)
1.
a piece of soft absorbent paper (usually two or more thin layers) used as a disposable handkerchief;
The Collaborative International Dictionary of English v.0.48:
Kleenex \Kleenex\ prop. n. [Trademark]
A piece of soft absorbent tissue paper (usually two or more
thin layers) used as a disposable handkerchief; -- still a
current trademark, but often used generically. [Trademark]
Syn: tissue.
[WordNet 1.5 +PJC]
WordNet (r) 3.0 (2006):
Kleenex
n 1: a piece of soft absorbent paper (usually two or more thin
layers) used as a disposable handkerchief