[...] it has been suggested that the word should be defined as "any segment of a sentence bounded by successive points 'at which pausing is possible'".
- Lyons (2004), a pag.18

According to Bloomfield the word is "a minimun free form". [...] Any free form no part of which is itself a free form is, by Bloomfield's definition, a word.
- Lyons (2004), a pag.20

Just us we must distinguish between the morph and the phonological (or orthographical) representation of the morpheme, so we must distinguish between phonological (or orthographical) words and the grammatical words which they represent. For example, the phonological word /sæŋ/ and the corresponding orthographic word "sang" represent a particular grammatical word, which is traditionally referred to as "the past tense of 'sing'" [...].
- Lyons (2004), a pag.16

One well-known definition of the word runs as follows: "A word may be defined as the union of a particular meaning with a particular complex of sounds capable of a particular grammatical employment". This definition, it will be observed, makes it a necessary condition that the word should be simultaneously a semantic, a phonological and a grammatical unit.
- Lyons (2004), a pag.19

The word is the unit "par excellence" of traditional grammatical theory. It is the basis of the distinction which is frequently drawn between morphology and syntax and it is the principal unit of lexicography (or "dictionary making").
- Lyons (2004), a pag.14