This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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ad. In a strict manner.

ad. In a limited manner; only

ad. In a narrow or limited sense.

ad. In a strict manner; closely; precisely.

In a strict manner.

Positively; definitely; stringently.

Rigorously; severely; without remission or indulgence; with close adherence to rule.

Exclusively; out-and-out; thoroughly.

ad. in a stringent manner

ad. restricted to something

ad. in a rigorous manner

"And in Mexico, the term "strictly protect" appeared to be attached to interlocutors indiscriminately, even when officials offered only flattering assessments of their government or said little that wasn't common knowledge."

strictly proper   

closely    precisely