To ask for (something).
To ask (somebody) to do something.
A message sent over a network to a server.
Act of requesting (with the adposition at in the presence of possessives, and on in their absence).
Condition of being sought after.
A formal message requesting something.
To select (something or someone) for a specific purpose.
To distinguish, make obvious the distinction between (two things) or of (something).
Used other than figuratively or idiomatically: to separate or isolate.