- a device for converting mechanical energy into electrical energy, esp one that produces direct current
Compare generator - informal an energetic hard-working person
WordReference Random House Learner's Dictionary of American English © 2026
dy•na•mo /ˈdaɪnəˌmoʊ/USA pronunciation
n. [countable], pl. -mos.
WordReference Random House Unabridged Dictionary of American English © 2026- Electricityan electric generator, esp. for direct current.
- an energetic, forceful person:She's a real dynamo.
dy•na•mo
(dī′nə mō′),USA pronunciation n., pl. -mos.
dynamo-,
- Electricityan electric generator, esp. for direct current.
- an energetic, hardworking, forceful person.
- short for dynamoelectric 1882
dynamo-,
- var. of dyna-: dynamometer.
Collins Concise English Dictionary © HarperCollins Publishers::
dynamo /ˈdaɪnəˌməʊ/ n ( pl -mos)
Collins Concise English Dictionary © HarperCollins Publishers::
dynamo-, (sometimes before a vowel) dynam- combining form
- indicating power: dynamoelectric, dynamite
'dynamo' also found in these entries (note: many are not synonyms or translations):
bipolar
- dynamite
- dynamo-
- fan belt
- lampblack
- Siemens
- air gap
- armature reaction
- compound
- dyna-
- dynamoelectric
- dynamogenesis
- dynamometer
- dynamometry
- excite
- generator
- load
- rated load
- windage