Focusing ones awareness and attention towards a single object during the entire session. The “object” in question can be the breath, visualization, external object (a flame), part of the body, a mantra etc. Through practice one can gain proficiency at focusing on the “object”. Through effort and practice distractions become less likely to occur and are often short-lived.
Examples of these are: Buddhist meditation, some forms of Zazen, Loving-Kindness Meditation, Chakra Meditation, Kundalini Meditation, Sound Meditation, Mantra Meditation, Pranayama, some forms of Qigong, and many others.