<p><strong>Noun</strong></p><ul><li>A morpheme or an entire word that is inserted within the body of another word or element, as Latin <em>m</em> in <em>accumbō</em> “I lie down,” as compared with <em>accubuī</em> “I lay down.”</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>To fix, fasten, or drive in: He infixed the fatal spear.</li><li>To instill (a fact, idea, etc.) in the mind or memory; impress: Your childhood trauma infixed these specific fears in your mind.</li><li>To add as an infix: The English language infixes only a small set of expletives and euphemisms, as in “fan-freakin-tastic” or “abso-bloody-lutely.”</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>(Of a linguistic form) to admit an infix: Polysyllabic words in English infix just before the stressed syllable, as in “abso-frickin-LUTEly.”</li></ul><p><strong>Adjective</strong></p><ul><li>Of or relating to operator notation that occurs between the operands, such as the symbols for addition, subtraction, multiplication, or division when written in a linear equation: We are familiar with infix notation from elementary math class, and it can also be used in logic statements or computer programming languages.</li></ul>