Definition of voice noun from the Oxford Advanced Learner's Dictionary

Oxford3000

voice

noun
vɔɪs
 
; vɔɪs
 
 
 

sound from mouth

1 [countable, uncountable] the sound or sounds produced through the mouth by a person speaking or singingI could hear voices in the next room.He recognized Sarah's voice.to speak in a deep/soft/loud/quiet, etc. voice‘I promise,’ she said in a small voice(= a quiet, shy voice).to raise/lower your voice(= to speak louder/more quietly)Keep your voice down(= speak quietly).Don't take that tone of voice with me!Her voice shook with emotion.‘There you are,’ said a voice behind me.When did his voice break(= become deep like a man's)?He was suffering from flu and had lost his voice(= could not speak).She has a good singing voice.She was in good voice(= singing well) at the concert tonight.
 

-voiced

2 (in adjectives) having a voice of the type mentionedlow-voicedsqueaky-voiced
 

opinion

3 [singular] voice (in something) the right to express your opinion and influence decisionsEmployees should have a voice in the decision-making process.4 [countable] a particular attitude, opinion or feeling that is expressed; a feeling or an opinion that you become aware of inside yourselfHe pledged that his party would listen to the voice of the people.Very few dissenting voices were heard on the right of the party.the voice of reason/sanity/conscience‘Coward!’ a tiny inner voice insisted.
 

grammar

5 [singular] the active/passive voice the form of a verb that shows whether the subject of a sentence performs the action (the active voice) or is affected by it (the passive voice)
 

phonetics

6 [uncountable] sound produced by movement of the vocal cords used in the pronunciation of vowels and some consonants see also voiced, voiceless
Idioms

give voice to something

to express your feelings, worries, etc
Many workers at the meeting gave voice to their fears about job security.

make your voice heard

to express your feelings, opinions, etc. in a way that makes people notice and consider them
The programme gives ordinary viewers a chance to make their voices heard.

with one voice

as a group; with everyone agreeing
The various opposition parties speak with one voice on this issue.
more at find your voice/tongue at find v., like, etc. the sound of your own voice at sound n., a/the still small voice at still adjective, at the top of your voice at top n.