What Is Machine Learning? Definition, Types, and Examples

What Is Machine Learning? A Beginner’s Guide

definition of ml

Modern ML models can be used to make predictions ranging from outbreaks of disease to the rise and fall of stocks. Currently, much of speech recognition training is being done by a Deep Learning technique called long short-term memory (LSTM), a neural network model described by Jürgen Schmidhuber and Sepp Hochreiter in 1997. LSTM can learn tasks that require memory of events that took place thousands of discrete steps earlier, which is quite important for speech. Similar to how the human brain gains knowledge and understanding, machine learning relies on input, such as training data or knowledge graphs, to understand entities, domains and the connections between them.

definition of ml

Most boosting algorithms are

made up of repetitive learning weak classifiers, which then add to a final

strong classifier. After being added, they are normally weighted in a way that

evaluates the weak learners’ accuracy. Then the data weights are “re-weighted.”

Input data that is misclassified gains a higher weight, while data classified

correctly loses weight. This environment allows future weak learners to focus

more extensively on previous weak learners that were misclassified. The model was created in 1949 by Donald Hebb in a book titled “The Organization of Behavior.” The book presents Hebb’s theories on neuron excitement and communication between neurons.

Classification & Regression

We’ll take a look at the benefits and dangers that machine learning poses, and in the end, you’ll find some cost-effective, flexible courses that can help you learn even more about machine learning. Bias and discrimination aren’t limited to the human resources function either; they can be found in a number of applications from facial recognition software to social media algorithms. Over the last couple of decades, the technological advances in storage and processing power have enabled some innovative products based on machine learning, such as Netflix’s recommendation engine and self-driving cars. Samuel also designed a number of mechanisms allowing his program to become better.

definition of ml

Machine learning, meanwhile, is a subset of AI that uses algorithms trained on data to produce models that can perform such complex tasks. To pinpoint the difference between machine learning and artificial intelligence, it’s important to understand what each subject encompasses. AI refers to any of the software and processes that are designed to mimic the way humans think and process information. It definition of ml includes computer vision, natural language processing, robotics, autonomous vehicle operating systems, and of course, machine learning. With the help of artificial intelligence, devices are able to learn and identify information in order to solve problems and offer key insights into various domains. Machine learning algorithms can use logistic regression models to determine categorical outcomes.


We will provide insight into how machine learning is used by data scientists and others, how it was developed, and what lies ahead as it continues to evolve. These examples are programmatically compiled from various online sources to illustrate current usage of the word ‘machine learning.’ Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. As computer algorithms become increasingly intelligent, we can anticipate an upward trajectory of machine learning in 2022 and beyond. Today, deep learning is finding its roots in applications such as image recognition, autonomous car movement, voice interaction, and many others. Moreover, games such as DeepMind’s AlphaGo explore deep learning to be played at an expert level with minimal effort. These devices measure health data, including heart rate, glucose levels, salt levels, etc.

definition of ml

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