verb

• (intransitive) To join in, to take part, to involve oneself (in something).
  "For the second year, foreign amateur runners were allowed to participate in a 10-kilometer race, a half-marathon or a full marathon in Pyongyang, the capital. The races were a part of the April 15 birthday celebration of Kim Il-sung, the former leader of North Korea and father of his successors: Kim Jong-il, a son, and Kim Jong-un, a grandson."
• (obsolete, transitive) To share, to take part in (something).
  "A spirit I am indeed; But am in that dimension grossly clad Which from the womb I did participate."
• (obsolete) To share (something) with others; to transfer (something) to or unto others.
  "1661, Thomas Salusbury, Galilaeus Galilaeus Lyncaeus, His Systeme of the World, Second Dialogue, in Mathematical Collections and Translations, London, p. 105, Make the Earth […] turn round its own axis in twenty four hours, and towards the same point with all the other Spheres; and without participating this same motion to any other Planet or Star, all shall have their risings, settings, and in a word, all their other appearances."

adj

• (obsolete) Acting in common; participating.
  "And, mutually participate, did minister Unto the appetite and affection common Of the whole body."