Definition of "susceptible"

susceptible

/səˈsɛptɪbl̩/

adjective
comparative more susceptible, superlative most susceptible
1. Likely to be affected by something.
2. Easily influenced or tricked; credulous.
3. (medicine) Especially sensitive, particularly to a stimulus.
4. That, when subjected to a specific operation, will yield a specific result.
5. Vulnerable.
  Quotations
  The visitors were being pinned back by the end of the first half. Yet Gordon Strachan's side played with great conviction and always had a chance of springing a surprise when their opponents were so susceptible at the back.
  2013 August 14, Daniel Taylor, The Guardian‎
6. Amenable.
  Quotations
  In the next several chapters, we put the basic tools to work in different contexts with particular specification of return and transition equations designed to render the Bellman equation susceptible to further analysis and computation.
  2018, Lars Ljungqvist and Thomas J. Sargent, Recursive Macroeconomic Theory, fourth edition, MIT Press, page 114
noun
plural susceptibles
1. (epidemiology) A person who is vulnerable to being infected by a certain disease
  Quotations
  In either instance a decrease in the number of susceptibles, by making the spread of virus less easy, tends towards a stage at which the infection dies out.
  1983, Topley & Wilson, editors, General Microbiology & Immunity‎, page 417