functioning

(noun) process or manner of functioning or operating. Synonyms: operation, performance. Examples: "The power of its engine determines its operation." "The plane's operation in high winds." "They compared the cooking performance of each oven." "The jet's performance conformed to high standards."

(verb) perform as expected when applied. Synonyms: function, work, operate, go, run. Examples: "The washing machine won't go unless it's plugged in." "Does this old car still run well?." "This old radio doesn't work anymore."

(verb) serve a purpose, role, or function. Synonyms: serve, function. Examples: "The tree stump serves as a table." "The female students served as a control group." "This table would serve very well." "His freedom served him well." "The table functions as a desk."

(verb) perform duties attached to a particular office or place or function. Synonyms: officiate, function. Example: "His wife officiated as his private secretary."

(adj) performing or able to perform its regular function. Synonyms: functioning (vs. malfunctioning). Example: "A functioning flashlight."