The verb can express "close a door" or "close a circuit", but cannot be used in other senses (for example "to close the meeting" or "to close a business"). The adjective "close" appears in the Dictionary as an unapproved word with the suggested approved alternative "near". So STE does not allow "do not go close to the landing gear", but it does allow "do not go near the landing gear". In addition to basic STE vocabulary listed in the Dictionary, Section 1, "Words", gives explicit guidelines for adding technical names and technical verbs that writers need to describe technical information. For example, words or phrases such as "overhead panel", "grease", "propeller", "to ream", and "to drill" are not listed in the Dictionary, but qualify as approved terms under the guidelines in Part 1, Section 1 (specifically, Writing Rules 1.5 and 1.12).