There are 2 main definitions of hobby in English:

hobby1

Line breaks: hobby
Pronunciation: /ˈhɒbi
 
/

noun (plural hobbies)

1An activity done regularly in one’s leisure time for pleasure: her hobbies are reading and gardening
More example sentences
  • This might be an opportune time to explore or return to hobbies, leisure activities or career pursuits.
  • Take a course or find an activity or hobby that brings you pleasure and allows you to meet people.
  • However, out of all her many hobbies and activities, Philippa's greatest love was gardening.
Synonyms
pastime, leisure activity, leisure pursuit, leisure interest, amateur interest, sideline, diversion, avocation, divertissement, enthusiasm;
recreation, relaxation, entertainment, amusement
informal thing
2 archaic A small horse or pony.

Origin

late Middle English hobyn, hoby, from pet forms of the given name Robin. Originally in sense 2 (compare with dobbin), it later came to denote a toy horse or hobby horse, hence 'an activity done for pleasure'.

Definition of hobby in:

There are 2 main definitions of hobby in English:

hobby2

Line breaks: hobby
Pronunciation: /ˈhɒbi
 
/

noun (plural hobbies)

A migratory Old World falcon with long, narrow wings, catching dragonflies and birds on the wing.
  • Genus Falco, family Falconidae: four species, e.g. the (northern) hobby (F. subbuteo) of Eurasia
More example sentences
  • Finally, the honey buzzards, young griffon vultures and hobbies mark the end of the spring or prenuptial migration, around the end of June.
  • This is a hobby, a bird that is extremely fast and acute in flight reaching speeds of up to 200 km/h.
  • The hobby is essentially an insect eater.

Origin

late Middle English: from Old French hobet, diminutive of hobe 'falcon'.

Definition of hobby in: