We've seen that documents can be represented as vectors in a vector space. But vector semantics can also be used to represent the meaning of words. We do this by associating each word with a word vector-a row vector rather than a column row vector vector, hence with different dimensions, as shown in Fig. 6 Figure 6 .5 The term-document matrix for four words in four Shakespeare plays. The red boxes show that each word is represented as a row vector of length four.