# X-bar theory

> in generative grammar, the theory of syntactic category formation that ① phrases may contain intermediate constituents projected from a head X; and that ② this system of projected constituency may be common to more than one category (e.g. N, V, A, P)

**Wikidata**: [Q1861110](https://www.wikidata.org/wiki/Q1861110)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/X-bar_theory)  
**Source**: https://4ort.xyz/entity/x-bar-theory


## References

1. Freebase Data Dumps. 2013
2. Quora