(singular only) The list published annually by Fortune magazine of the 500 United States companies with the highest revenue. / (plural only) Collectively, the members of that list.

(athletics) A long-distance running race over 5000 metres.

Former designation of Nelarabine; a chemotherapy prodrug used in treatment of T-cell acute lymphoblastic leukemia.

(sports) An equal number of wins and losses.

US standard spelling of 5000 metres.

(humorous, Canada, US) This is my guess.

plural of Fortune 500

(US, slang) gone; departed from a place

plural of 50K

(athletics) A 50 kilometer race.