The definition of overt is something that is out in the open.
An example of overt is public displays of affection.
Open and observable; not hidden, concealed, or secret.
Overt hostility; overt intelligence gathering.
Of, relating to, or being military or intelligence operations sanctioned or mandated by Congress.
Overt aid to the rebels.
Not hidden; open; observable; apparent; manifest.
Done openly and publicly, without attempt at concealment and with evident intent.
Unconcealed; open and observable; not secret.
Origin of overt
Middle English from Old French past participle of ovrir to open from Vulgar Latin ōperīre alteration (influenced by Latin cōperīre to cover) of Latin aperīre wer-4 in Indo-European roots