之首 zhī shǒu — the head of; the foremost of 之首 zhī shǒu Characters: 之 · 首 Definitions the head of; the foremost of Examples 他把安全放在各项工作之首。 He puts safety at the top of all his work. 这家商场居全市同类之首。 This mall ranks first among its kind in the city.