Things to remember. 1  Caffeine is a stimulant drug that acts on the brain and nervous system. 2  Like many other drugs, it is possible to become dependent on caffeine.  Pregnant women, athletes and children should limit their intake of caffeine.
hobby1. 1  an activity or interest pursued for pleasure or relaxation and not as a main occupation: Her hobbies include stamp-collecting and woodcarving. 2  a child's hobbyhorse. 3  Archaic. a small horse. 4  ride a hobby, to concern oneself excessively with a favorite notion or activity. Also, ride a hobbyhorse.
noun. 1  An amateur is an individual who is new to, or not yet skilled in, a particular skill or sport. An example of an amateur is someone who enjoys and studies astronomy as a hobby but not as a professional. 2  The definition of an amateur is someone who plays a sport but does not receive compensation for it. An example of an amateur are many of the athletes in the Olympics. amateur