greenlight

1. (transitive, idiomatic, informal) To approve; to permit to proceed.Examples: "Labour's Shadow Chancellor Anneliese Dodds hit back at Sunak and said that his failure to greenlight major projects such as Northern Powerhouse Rail showed that government claims of levelling up the country were "not supported by the evidence"."; "The United Kingdom (UK) is reportedly waiting for US approval before greenlighting Ukrainian forces to use UK-provided Storm Shadow missiles for long-range strikes against military targets in Russia."Synonyms: allow, approve, give the go-ahead, give the green light, permit, rubber stamp, wave throughidiomaticinformaltransitive

2. (transitive, slang, idiomatic) To approve or requisition the harming or death of; to put a hit out on.idiomaticslangtransitive