estimate

1. estimate (noun) — sense 1

Definition: A rough calculation or assessment of the value, size, or cost of something.

Example: “They know our boats will stand up to their work,” said Willison, “and that counts for a good deal. A low estimate from us doesn't mean scamped work, but just that we want to keep the yard busy over a slack time.”

2. estimate (noun) — sense 2

Definition: A rough calculation or assessment of the value, size, or cost of something.: A document (or verbal notification) specifying how much a job is likely to cost.

3. estimate (noun) — sense 3

Definition: An upper limitation on some positive quantity.

Example: The desired norm estimate is now obtained from the identity... [referring to an earlier statement saying that a certain norm is less than or equal to a certain expression]