the act of giving hope or support to someone
"Her encouraging words really boosted his confidence before the big presentation."
A push from behind, as to one who is endeavoring to climb.
"When I reached for the top rung of the ladder and felt myself slipping backward, my friend quickly gave me a boost."
In plain English: A boost is something that helps you go faster or do better than you could on your own.
"The team received a confidence boost after winning the first game."
Usage: In everyday usage, a boost refers to any act of helping someone succeed or improving something's condition, such as receiving financial aid or getting a performance increase. While the original sense involves physically pushing someone up, the modern meaning broadly covers any positive support or enhancement.
push or shove upward, as if from below or behind
"The singer had to be boosted onto the stage by a special contraption"
To lift or push from behind (one who is endeavoring to climb); to push up.
"He reached down to boost his younger brother up the slippery fence so he could reach the top rung."
In plain English: To boost something means to make it stronger, faster, or better by adding energy or help.
"The new marketing campaign will boost our sales significantly."
Usage: Use "boost" to mean helping someone achieve success or increasing something in value, such as boosting sales or morale. Avoid using it literally for physically lifting a person while they climb unless you are describing a specific athletic maneuver.
The origin of "boost" is unknown, but the verb first appeared in 1815 and the noun followed in 1825. It likely shares a root with Scots words meaning to move or drive away, though it may also be related to "boast."