# Extensions This section describes the different extensions supported: ## Definition lists A custom container is similar to a fenced code block, but it is using the character `:` to declare a block (with at least 3 characters), and instead of generating a `
...
` it will generate a `
...
` block. ```````````````````````````````` example Term 1 : This is a definition item With a paragraph > This is a block quote - This is a list - with an item2 ```java Test ``` And a last line : This ia another definition item Term2 Term3 *with some inline* : This is another definition for term2 .
Term 1

This is a definition item With a paragraph

This is a block quote

Test

And a last line

This ia another definition item
Term2
Term3 with some inline
This is another definition for term2
```````````````````````````````` A definition term can be followed at most by one blank line. Lazy continuations are supported for definitions: ```````````````````````````````` example Term 1 : Definition with lazy continuation. Second paragraph of the definition. .
Term 1

Definition with lazy continuation.

Second paragraph of the definition.

```````````````````````````````` The `:` or `~` must be followed by at least one space or tab. A single space is enough: ```````````````````````````````` example First Term : This is the definition of the first term. Second Term : This is one definition of the second term. ~ This is another definition of the second term. .
First Term
This is the definition of the first term.
Second Term
This is one definition of the second term.
This is another definition of the second term.
```````````````````````````````` Without a space or tab after the `:`, the line is not a definition: ```````````````````````````````` example Term 1 :Invalid without a space after the colon .

Term 1 :Invalid without a space after the colon

```````````````````````````````` The `:` can be indented up to 3 spaces: ```````````````````````````````` example Term 1 : Valid even if `:` starts at most 3 spaces .
Term 1
Valid even if : starts at most 3 spaces
```````````````````````````````` But more than 3 spaces before `:` will trigger an indented code block: ```````````````````````````````` example Term 1 : Not valid .

Term 1

: Not valid
```````````````````````````````` Definition lists can be nested inside list items ```````````````````````````````` example 1. First 2. Second Term 1 : Definition Term 2 : Second Definition .

  1. First

  2. Second

    Term 1
    Definition
    Term 2
    Second Definition
````````````````````````````````