on or about

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Also found in: Medical.

On or about

Near; approximately; without significant variance from an agreed date.

The phrase on or about is used to avoid being bound to a more precise statement than is required by law. For example, when an individual seeks to purchase a home, the date when the transaction is closed and the legal title and possession are transferred from seller to buyer is ordinarily scheduled on or about a particular date. The phrase is used to indicate that the parties recognize the fact that, although the exact date might not be convenient for both of them, the transaction should be completed as close to that date as is practicable.

on or about

prep. a phrase referring to a date or place used in a complaint in a lawsuit or criminal charge if there is any uncertainty at all, in order to protect the person making the allegations of fact from being challenged as being inaccurate. Thus, a complaint will read "On or about July 11, 1994, Defendant drove his vehicle negligently and without due care on or about the corner of Sunset and Vine Streets..." (See: complaint, charge)

on or about

adverb approximately, in the general time frame, in the immediate vicinity of, in the neighborrood of, more or less, somewhere about
References in periodicals archive ?
Zoonotic Onchocerca lupi infection in dogs, Greece and Portugal, 2011-2012.
River blindness is a debilitating neglected tropical disease caused by the worm Onchocerca volvulus, which is transmitted through the bites of infected blackflies.
Caused by the parasite onchocerca volvulus, river blindness is the second-leading infectious cause of blindness in the world and is transmitted to humans via the bite of a certain species of black fly that is commonly found near rivers.
Currently, they have added genome sequencing of wBm and Onchocerca volvulus (Ov) with the Sanger Institute, NEB and TIGR.
River blindness, also known as Ochocerciasis is an eye and skin disease caused by a tiny worm called onchocerca volvulus, which is spread by the bite of an infected black fly.
San Francisco will develop 3-Dimensional in vitro culturing systems to support the development of Onchocerca volvulus and Brugia malayi infective larvae to the adult stages.
Prevalence of Elaeophora schneideri and Onchocerca cervipedis in mule deer from central Utah.
Ochocerciasis is a human disease caused by both adult and juvenile stages of Onchocerca volvulus.
River blindness is caused by thread-like filarial nematode worms, Onchocerca volvulus, which are transmitted among humans through the bite of a black fly.
Summary of parasitic diseases not confined to the skin Disease Pathogen Vector Geographic distribution Onchocerciasis Onchocerca Blackflies Equatorial (Fig.
The disease is caused by a black fly-bite that results in Onchocerca volvulus, a parasitic worm that lives in the human body.