in the presence of sth
prep. phr..prep. phr.. to be in the same place as something, or to happen while something else is there.
prep. phr.. a prepositional phrase indicating the physical proximity or existence of a specific substance, person, or condition within a given environment.
The chemical changes color in the presence of oxygen.
The witness felt nervous testifying in the presence of the defendant during the trial.
Certain rare minerals only form deep within the earth's crust in the presence of extreme heat and immense pressure.
often used in scientific contexts or formal legal and social descriptions.
contrast with 'in front of' which is purely spatial; 'in the presence of' implies a state of being or a chemical/social influence.
in presence of oxygenin the presence of oxygenthe definite article 'the' is a mandatory part of this fixed prepositional phrase.