On or about

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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)

References in periodicals archive ?
Previous programs sought to control the black flies that transmit the disease-causing parasitic worm Onchocerca volvulus, without much success.
Phytochemical analysis and in vitro anthelmintic activity of Lophira lanceolata (Ochnaceae) on the bovine parasite Onchocerca ochengi and on drug resistant strains of the free-living nematode Caenorhabditis elegans.
The infecting parasite, Onchocerca volvulus, is transmitted by the bite of the Black Fly, appropriately named Simulium damnosum, and so the programme began in 1974 with spraying from' helicopters of the fly's habitats along streams.
River blindness is a filarial disease, like elephantiasis, and occurs when the parasitic worm Onchocerca volvulus takes up residence in the skin.
River blindness is caused by a parasitic worm, Onchocerca volvulus.
The primers used target a 724 bp fragment of the mitochondrial cytochrome oxidase subunit I gene and are specific for various filarioid helminths (e.g., Dirofilaria, Wuchereria, Brugia, Onchocerca, Setaria, and Acanthocheilonema).
(1980).Efficacy of ivermectin against adult Seteria equine and microfilaria of Onchocerca cervicalis in ponies.
The black flies are vectors of river blindness, a neglected tropical disease (NTD) caused by infection with the parasitic worm Onchocerca volvulus.
Onchocerciasis (river blindness) is a neglected tropical disease (NTD) caused by the parasite Onchocerca volvulus and transmitted by riverine vectors of Simulium sp.