To list all aliases and their functions:
Get-Alias
To get all aliases for specific cmdlet:
PS C:\> get-alias -Definition Get-ChildItem
CommandType Name Version Source
----------- ---- ------- ------
Alias dir -> Get-ChildItem
Alias gci -> Get-ChildItem
Alias ls -> Get-ChildItem
To find aliases by matching:
PS C:\> get-alias -Name p*
CommandType Name Version Source
----------- ---- ------- ------
Alias popd -> Pop-Location
Alias proc -> Get-Process
Alias ps -> Get-Process
Alias pushd -> Push-Location
Alias pwd -> Get-Location