For reactions involving oxygen, the gain of oxygen implies the oxidation of the atom or molecule to which the oxygen is added (and the oxygen is reduced). In organic compounds, such as butane or ethanol, the loss of hydrogen implies oxidation of the molecule from which it is lost (and the hydrogen is reduced).
In Ethiopian Orthodoxy, fasting (tsome) lasts for 55 continuous days before Easter (Fasika), although the fast is divided into three separate periods: Tsome Hirkal, eight days commemorating an early Christian figure; Tsome Arba, forty days of Lent; and Tsome Himamat, seven days commemorating Holy Week.
The Catholic Church, in an attempt to help Catholics do at least a minimum during Lent, asks all Catholics to fast and abstain from meat on certain days. Fasting means to limit food to one full meal a day with the possibility of two smaller meals (not adding up to a full meal) as needed.