How do differentiate between 'Requirements Gathering' and 'Requirements Elicitation'?

Hi Ahmed, 

Gathering" assumes that the requirements already exist and are ready for documentation or review and forwarding to developers. "Elicitation" means gathering and understanding information, information that has to be analyzed to produce the requirements. Business analysts who "gather requirements" are recording existing requirements; business analysts who elicit information are using their analytical skills to define a solution and requirements to solve the expressed business problem. 

Hope this helps. Please feel free to contact to discuss further. 

Cheers

Usman

Requirements gathering is the old term that means collecting requirements from multiple stakeholders.

However, elicitation refers to the art of evoking requirements from the stakeholders which brings about a more better results and involves and engages better participation and contribution in generating requirements from stakeholders