The difference between Budget and Low-cost

When used as adjectives, budget means of or relating to a budget, whereas low-cost means low in price.

Budget is also noun with the meaning: the amount of money or resources earmarked for a particular institution, activity or time-frame.

Budget is also verb with the meaning: to construct or draw up a budget.

check bellow for the other definitions of Budget and Low-cost

Budget as a noun:

The amount of money or resources earmarked for a particular institution, activity or time-frame.
Budget as a noun:

An itemized summary of intended expenditure; usually coupled with expected revenue.
Budget as a noun (obsolete):

A wallet, purse or bag.
Budget as a noun (obsolete):

A compact collection of things.
Budget as a noun (obsolete, military):

A socket in which the end of a cavalry carbine rests.

Budget as an adjective:

Of or relating to a budget.
Budget as an adjective:

Appropriate to a restricted budget.

Examples:

"We flew on a budget airline."

Budget as a verb (intransitive):

To construct or draw up a budget.

Examples:

"Budgeting is even harder in times of recession"
Budget as a verb (transitive):

To provide funds, allow for in a budget.

Examples:

"The PM’s pet projects are budgeted rather generously"
Budget as a verb (transitive):

To plan for the use of in a budget.

Examples:

"The prestigious building project is budgeted in great detail, from warf facilities to the protocollary opening."