To employ by paying a retainer.
To hold back (a pupil) instead of allowing them to advance to the next class or year.
To keep in one's pay or service.
To keep in possession or use.
To hold secure.
To undergo a transformation; to change in appearance or character.
To change greatly the appearance or form of.
To subject to the action of a transformer.
To subject to a transformation; to change into another form without altering the value.
To subject (a cell) to transformation.
To change the nature, condition or function of; to change in nature, disposition, heart, character, etc.; to convert.
A transform fault.
An operation (often an integration) that converts one function into another.
A function so produced.