Webster
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Webster’s Revised Unabridged Dictionary · 1913

Interfere

In′ter·fere′ (ĭn′tẽr·fēr′), v. i. [imp. & p. p. Interfered; p. pr. & vb. n. Interfering.] [OF. entreferir to strike each other; entre between (L. inter) + OF. ferir to strike, F. férir, fr. L. ferire. See Ferula.]

1. To come in collision; to be in opposition; to clash; as, interfering claims, or commands.

2. To enter into, or take a part in, the concerns of others; to intermeddle; to interpose.

To interfere with party disputes. Swift.

There was no room for anyone to interfere with his own opinions. Bp. Warburton.

3. To strike one foot against the opposite foot or ankle in using the legs; — sometimes said of a human being, but usually of a horse; as, the horse interferes.

4. (Physics) To act reciprocally, so as to augment, diminish, or otherwise affect one another; — said of waves, rays of light, heat, etc. See Interference, 2.

5. (Patent Law) To cover the same ground; to claim the same invention.

Syn. — To interpose; intermeddle. See Interpose.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.