To commence with, how we determine the meaning of a particular word depends on “the surrounding environment” the word in. It is not uncommon for us to find a word with several meanings and a same word may have 2 completely different meanings under different circumstances. To cite an example, “glass” can be interpreted as a transparent, hard and brittle material which is made of silicon; it can mean a tall and transparent vessel for drinking liquid; when “glass” is in plural form (that is “glasses”), one can also interpret it as a pair of spectacles or a pair of binoculars. Consider the following 2 sentences –
a) The delicate souvenir of his wedding is made of glass.
b) Give me a glass of lemonade please.
Obviously, the word “glass” in a) refers to the first meaning (a transparent material) and that in b) refers to the drinking vessel. Linguists regarded the phenomenon that a same word or name is used to denote different things as homonyms (Oxford English Dictionary, 1989). One has to consider a sentence or even a paragraph as a whole to determine the exact meaning of a particular word.
Prototype is one factor making Jackendoff’s statement true. It can be cltural perspective or personal. For personal, when it comes to “toys”, a little boy may
References: Oxford English Dictionary OED online, Second Edition, 1989 Oxford English Dictionary OED online, Draft Revision, June 2010 Radden, G.,Kopcke, K.M. ,Berg, T. , Siemud, P. (2007). The construction of meaning in language. Aspect of meaning construction. John Benjamins Publishing Company.