Definition of top of the line Top of the line

We found 2 definitions of top of the line from 2 different sources.

What does top of the line mean?

Noun
top of the line - the best (most expensive) in a given line of merchandise
		merchandise, ware, product commodities offered for sale; "good business depends on having good merchandise"; "that store offers a variety of products"

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top of the line (Adjective)
The best, fanciest, or highest quality, especially among selections in a product line .

top of the line in sign language