Tartan or plaid?

[unixken]

Something to help put OB's use of the word plaid in context, is this:

https://www.google.com/search?q=plai...w=2000&bih=953

In U.S. vernacular, these are "plaid" shirts, and I believe OB's question is "What differentiates these types of patterns... many of which are (and many of which aren't) identical in warp and weft... from "tartans?"

OB, am I correct in seeing what you are trying to get at?

[McElmurry]

I reviewed the Oxford Dictionary online in both British and US English.

British English-Tartan
a woollen cloth woven in one of several patterns of coloured checks and intersecting lines, especially of a design associated with a particular Scottish clan

US English-Tartan
a woolen cloth woven in one of several patterns of plaid, especially of a design associated with a particular Scottish clan

Comparing the two definitions we see the word plaid in US English is equivalent to coloured checks and intersecting lines in British English.

The US and British English definitions of plaid are the same.
checkered or tartan twilled cloth, typically made of wool.
a long piece of plaid worn over the shoulder as part of Scottish Highland dress.

[TheOfficialBren]

Something to help put OB's use of the word plaid in context, is this:

https://www.google.com/search?q=plai...w=2000&bih=953

In U.S. vernacular, these are "plaid" shirts, and I believe OB's question is "What differentiates these types of patterns... many of which are (and many of which aren't) identical in warp and weft... from "tartans?"

OB, am I correct in seeing what you are trying to get at?

Ken, spot on, sir.
BINGO!!
That is what I am asking.