What is the definition of dialect in the context of language?

The definition of dialect as "a form of a language spoken by people based on geographical region" accurately captures the essence of what a dialect is in linguistic terms. Dialects encompass variations in pronunciation, vocabulary, and grammar that distinguish different groups of speakers, often influenced by the geographical area in which they live.

For instance, an individual from the southern United States may speak English differently than someone from the northeastern region, using distinct phrases or slang that reflect their local culture and history. These unique characteristics can lead to the formation of regional dialects, which serve not only as a means of communication but also as a marker of identity among speakers.

The other options present concepts that, while related to language, do not capture the specific definition of dialect. A specific style of writing, methods of teaching, and formal language usage all pertain to different aspects of language and communication but do not address the regional variations that characterize dialects.