The difference between “Shirt” & “T-Shirt”

Difference between shirt & blouse:

A shirt is the general term for anything from a halter top to a hair shirt, and a blouse refers to something more specific. It doesn't have to be short or long sleeved. They have buttons or zippers, some kind of closure, and are made of a fine fabric like silk or satin so it can hang loosely.

Types of shirt:

T-shirt, tank top, blouse, polo, jersey, dress shirt,
henley, scoop neck, V-neck, button-down shirt, long-sleeved shirt,
short-sleeved shirt, sleeveless shirt, cami, sweatshirt, hoodie

As nouns the difference between blouse and shirt is that blouse is an outer garment, usually loose, that is similar to a shirt and reaches from the neck to the waist or below nowadays, in colloquial use, blouse refers almost always to a woman's shirt that buttons down the front while shirt is an article of clothing that is worn on the upper part of the body, and often has sleeves, either long or short, that cover the arms.

As verbs the difference between blouse and shirt is that blouse is to hang a garment in loose folds while shirt is to cover or clothe with a shirt, or as if with a shirt. 

Word Definitions

Blouse - (noun) An outer garment, usually loose, that is similar to a shirt and reaches from the neck to the waist or below. Nowadays, in colloquial use, blouse refers almost always to a woman's shirt that buttons down the front.

Shirt (noun) An article of clothing that is worn on the upper part of the body, and often has sleeves, either long or short, that cover the arms.