DadgogoAI Dictionary

Dictionary entry

loss function

noun \ˈlȯs ˈfəŋ(k)-shən\

also loss

TopicFundamentals Senses1
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Definition of loss function

  1. : a formula that measures how wrong a model's output is during training; training tries to make this number as small as possible

    • The loss went down steadily for two weeks, then flattened.
    • Choosing the right loss function is half of the design.

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Related terms

gradient descent an optimization method that improves a model step by step by moving its parameters a little in… training the process of feeding data to a model and repeatedly adjusting its parameters so its outputs… reward model a separate model trained to score how good a response is, used to guide reinforcement learning…

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"Loss function." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/loss-function/. Accessed 4 Oct. 2026.

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