To allow to operate at higher speed by adjusting controls.(verb)
To enlarge by adjusting one or more seams.(verb)
Of sound, to emit.(verb)
To disclose.(verb)
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Use "let out" in a sentence
"Lynne had barely let out a groan when he passed her on the way to Exochemistry, although she had managed a smile that fueled him all the way to class."
"Thanas let out a snort of a laugh, and ignored Spock."
"She should be let out of jail at "an offbeat time like 3 or 4 in the morning," said Daniel Meachum, an Atlanta lawyer who has represented football star Michael Vick and actor Wesley Snipes."