...and In 3Rd Place...

[ratebeck2]

1) what is the third dimension of an object
2) what is the third person singular

[elliemay1]

2. he/she

[Prudie]

2 is 'he, she or it'
1 I'd have thought depth.

[TheWinner]

2. He, She or It ?????? A bit of a strange question.

[Calibax]

1. 3 dimensions are length, width and height but they are in no particular order so i don't know which you would define as third.
2. He, She or it

[Calibax]

^and depending on circumstances dimensions could be described as depth or breadth.

[elliemay1]

1. Maybe it's height as 2D is length and breadth.

[frugalfred]

The third dimension is a primary dimension of space and is usually denoted as depth.
The dimension whereby a solid object differs from a two-dimensional drawing of it