To depend on sth
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to trust someone or something and know that that person or thing will help you or do what you want or expect him, her, or it to do:
To depend on sth meaning & definition 1 of To depend on sth.
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to need something, or need the help and support of someone or something, in order to live or continue as before:
To depend on sth meaning & definition 2 of To depend on sth.
