APE noun 1forms 1phrases 3 noun1 •Initialism of alkylphenol ethoxylate.The most important and commonly used APEs are nonylphenol ethoxylates (NPEs), which account for 80% of the APE market. — 2008 formsAPEs Phrases with APE ape inTo buy recklessly large amounts of an untried cryptocurrency. ape leaderAn old maid. naked apeA human being.