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Use "lookers-on" in a sentence
"Jamie edged casually through the fringe of lookers-on."
"Accordingly, various instructions and prohibitions have been prescribed for modest deportment in society, such as the directive that “Husband and wife are not allowed to flaunt their love for each other [...] in the presence of others, so that the lookers-on might not come to sinful thoughts” (Kizur Shulhan Arukh 152: 11; Goldin 1961, vol. 4: 20)."
"I arrived at the appointed hour, just as Kennedy entered the meeting room overflowing with invited guests and thrice that number of lookers-on."