what does ‘genetically engineered’ mean?

Question: what does 'genetically engineered' mean?
- Keywords:
  gene,
  genetically engineered,
  technology
Asked by sloth-savior to Zoe, Sarah, Elaine, David, Aaron on 15 Nov 2014.
- David Foley answered on 15 Nov 2014:
  
  Genetic engineering is the deliberate modification of an organisms DNA to confer specific properties. It has existed since humans first started to breed animals and plants, although we now have more sophisticated technologies and we can dramatically accelerate the process.
- Zoe Roberts answered on 17 Nov 2014:
  
  Genetically engineered is when man changes the gentic make up of a particular organism. This is usually to make the organism better or more suited to the qualities that is required from a organism. This is common in the crops that we grow. Crops are genetically engineered to be able to better withstand the cold (for example) better than the previous crop did.

sloth-savior commented on 17 Nov 2014:

is this used in medicines

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David commented on 17 Nov 2014:

Not directly. What we are doing now is genetically engineering bacteria so they produce useful products for the chemical industry. This can be a more sustainable source of the raw materials I use every day in drug discovery

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Question: what does 'genetically engineered' mean?