or

1. Connects at least two alternative words, phrases, clauses, sentences, etc. each of which could make a passage true. In English, this is the "inclusive or." The "exclusive or" is formed by "either [...] or".

   He might get cancer, or be hit by a bus, or God knows what.

2. An operator denoting the disjunction of two propositions or truth values. There are two forms, the inclusive or and the exclusive or.
3. Counts the elements before and after as two possibilities.
4. Otherwise (a consequence of the condition that the previous is false).

   It's raining! Come inside or you'll catch a cold!

5. Connects two equivalent names.

   The country Myanmar, or Burma

noun

The binary operator inclusive or, true if one at least one of two inputs is true. In infix notation.

1. Initialism of Olympic Record.
2. Initialism of odorant receptor.
3. Initialism of olfactory receptor.
4. (Wiktionary and WMF jargon) Initialism of original research.

noun

A room in a hospital used for performing surgical operations.

noun

(operations) The application of scientific methods and techniques to problems of decision making, especially in business management and government administration.

noun

The gold or yellow tincture on a coat of arms.

adjective

Of gold or yellow tincture on a coat of arms.

1. Early (on).
2. Earlier, previously.

preposition

Before; ere. Followed by "ever" or "ere".