Meaning & use
alkaline
Having a pH greater than 7, meaning the substance is basic rather than acidic.
See it in a sentence
Gardeners add lime to make acidic soil more alkaline for certain crops.
The lake's alkaline water supports unusual algae not found in neutral lakes.
A note on using this word
Alkaline is the opposite of acidic on the pH scale; common alkaline substances include baking soda and soap.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
acidic
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